Station Overview Station Location
Station Number CO-BO-306 Latitude 40.10444444
Station Name Niwot 0.9 NE Longitude -105.1438889
County Boulder Elevation (ft) 5141



Month 30 Yr Avg by PRISM Total Prcp Sum Days Covered By All Observations Daily Prcp Sum Daily Observation Count Multiday Prcp Sum Days Covered by Multiday Observations Multiday Observation Count Days With Prcp Days With Trace Total Snowfall Days With Snowfall Days With Snow On Ground
Oct 18 1.02 1.28 22 1.11 11 0.17 11 5 5 1 0.0 0 0
Nov 18 0.85 0.49 22 0.10 6 0.39 16 3 1 0 0.0 0 0
Dec 18 0.58 0.09 16 0.00 4 0.09 12 3 0 0 0.0 0 0
Jan 19 0.42 0.82 28 0.10 9 0.72 19 5 2 1 0.0 0 0
Feb 19 0.50 1.33 19 0.00 1 1.33 18 4 0 0 0.0 0 0
March 19 1.55 0.30 22 0.03 6 0.27 16 2 2 0 0.0 0 0
April 19 1.85 1.05 24 0.00 6 1.05 18 7 0 0 0.0 0 0
May 19 2.33 0.40 19 0.22 3 0.18 16 2 3 0 0.0 0 0
June 19 1.79 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 19 1.32 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 19 1.37 0.00 1 0.00 1 0.00 0 0 0 0 0.0 0 0
Sept 19 1.45 1.99 31 1.86 14 0.13 17 5 3 0 0.0 0 0
Water Year Totals: 15.03" 7.75" 204 days 3.42" 61 4.33" 143 days 36 16 days 2 days 0.0" 0 days 0 days



Days in Water Year Cell Color Key
        Daily Observation with Prcp         Missing Day
        Multiday Observation         Daily/Multiday Observation Conflict

Day of Year Daily Prcp Multiday Prcp
10/1/2018 0.02
10/2/2018 0.00
10/3/2018 **
10/4/2018 0.03
10/5/2018 0.08
10/6/2018 M
10/7/2018
10/8/2018 0.45
10/9/2018 0.37
10/10/2018 **
10/11/2018 0.12
10/12/2018
10/13/2018
10/14/2018
10/15/2018
10/16/2018 M
10/17/2018 T
10/18/2018 0.01
10/19/2018 0.00
10/20/2018 **
10/21/2018 **
10/22/2018 0.00
10/23/2018 0.00
10/24/2018 0.00
10/25/2018
10/26/2018
10/27/2018 **
10/28/2018 **
10/29/2018 0.00
10/30/2018 0.00
10/31/2018 0.20
11/1/2018
11/2/2018
11/3/2018
11/4/2018
11/5/2018 0.00
11/6/2018
11/7/2018
11/8/2018 0.00
11/9/2018 0.00
11/10/2018 **
11/11/2018 **
11/12/2018 0.11
11/13/2018 0.00
11/14/2018
11/15/2018
11/16/2018 **
11/17/2018 **
11/18/2018 **
11/19/2018 **
11/20/2018 **
11/21/2018 **
11/22/2018 **
11/23/2018 **
11/24/2018 **
11/25/2018 **
11/26/2018 0.28
11/27/2018 **
11/28/2018 0.00 0.00
11/29/2018
11/30/2018 0.10
12/1/2018 **
12/2/2018 **
12/3/2018 0.06
12/4/2018 M
12/5/2018 **
12/6/2018 **
12/7/2018 **
12/8/2018 **
12/9/2018 **
12/10/2018 0.03
12/11/2018 0.00
12/12/2018 0.00
12/13/2018 0.00
12/14/2018 0.00
12/15/2018 **
12/16/2018 **
12/17/2018 0.00
12/18/2018
12/19/2018
12/20/2018
12/21/2018
12/22/2018
12/23/2018
12/24/2018
12/25/2018
12/26/2018
12/27/2018
12/28/2018
12/29/2018
12/30/2018
12/31/2018
Day of YearDaily PrcpMultiday Prcp
1/1/2019 **
1/2/2019 **
1/3/2019 **
1/4/2019 **
1/5/2019 **
1/6/2019 **
1/7/2019 0.02
1/8/2019 **
1/9/2019 0.00
1/10/2019 0.00
1/11/2019 0.08
1/12/2019 **
1/13/2019 **
1/14/2019 0.43
1/15/2019
1/16/2019 0.00
1/17/2019 0.00
1/18/2019 0.00
1/19/2019 **
1/20/2019 **
1/21/2019 **
1/22/2019 0.18
1/23/2019 0.00
1/24/2019 0.02
1/25/2019
1/26/2019 **
1/27/2019 **
1/28/2019 0.09
1/29/2019 0.00
1/30/2019 T
1/31/2019
2/1/2019 0.00
2/2/2019
2/3/2019
2/4/2019 **
2/5/2019 0.00
2/6/2019
2/7/2019
2/8/2019
2/9/2019 **
2/10/2019 **
2/11/2019 0.01
2/12/2019 **
2/13/2019 **
2/14/2019 **
2/15/2019 **
2/16/2019 **
2/17/2019 **
2/18/2019 **
2/19/2019 **
2/20/2019 **
2/21/2019 **
2/22/2019 0.02
2/23/2019
2/24/2019
2/25/2019
2/26/2019 **
2/27/2019 1.30
2/28/2019
3/1/2019 0.00
3/2/2019 **
3/3/2019 **
3/4/2019 0.27
3/5/2019 0.00
3/6/2019
3/7/2019 0.02
3/8/2019
3/9/2019
3/10/2019
3/11/2019 0.01
3/12/2019 0.00
3/13/2019
3/14/2019
3/15/2019 M
3/16/2019 **
3/17/2019 **
3/18/2019 **
3/19/2019 0.00
3/20/2019
3/21/2019 0.00
3/22/2019
3/23/2019 **
3/24/2019 **
3/25/2019 **
3/26/2019 **
3/27/2019 **
3/28/2019 **
3/29/2019 **
3/30/2019 **
3/31/2019 **
Day of YearDaily PrcpMultiday Prcp
4/1/2019 0.28
4/2/2019 0.00
4/3/2019
4/4/2019 0.00
4/5/2019 0.00
4/6/2019 **
4/7/2019 **
4/8/2019 0.00
4/9/2019 0.00
4/10/2019 **
4/11/2019 0.14
4/12/2019 0.00
4/13/2019
4/14/2019
4/15/2019 M
4/16/2019 0.00
4/17/2019
4/18/2019 **
4/19/2019 0.20
4/20/2019 **
4/21/2019 **
4/22/2019 0.21
4/23/2019
4/24/2019 **
4/25/2019 0.00
4/26/2019 **
4/27/2019 **
4/28/2019 **
4/29/2019 **
4/30/2019 0.22
5/1/2019 0.15
5/2/2019 0.02
5/3/2019
5/4/2019 **
5/5/2019 **
5/6/2019 0.00
5/7/2019 0.05
5/8/2019 **
5/9/2019 **
5/10/2019 **
5/11/2019 **
5/12/2019 **
5/13/2019 **
5/14/2019 **
5/15/2019 **
5/16/2019 **
5/17/2019 **
5/18/2019 **
5/19/2019 **
5/20/2019 0.18
5/21/2019
5/22/2019
5/23/2019
5/24/2019
5/25/2019
5/26/2019
5/27/2019
5/28/2019
5/29/2019
5/30/2019
5/31/2019
6/1/2019
6/2/2019
6/3/2019
6/4/2019
6/5/2019
6/6/2019
6/7/2019
6/8/2019
6/9/2019
6/10/2019
6/11/2019
6/12/2019
6/13/2019
6/14/2019
6/15/2019
6/16/2019
6/17/2019
6/18/2019
6/19/2019
6/20/2019
6/21/2019
6/22/2019
6/23/2019
6/24/2019
6/25/2019
6/26/2019
6/27/2019
6/28/2019
6/29/2019
6/30/2019
Day of YearDaily PrcpMultiday Prcp
7/1/2019
7/2/2019
7/3/2019
7/4/2019
7/5/2019
7/6/2019
7/7/2019
7/8/2019
7/9/2019
7/10/2019
7/11/2019
7/12/2019
7/13/2019
7/14/2019
7/15/2019
7/16/2019
7/17/2019
7/18/2019
7/19/2019
7/20/2019
7/21/2019
7/22/2019
7/23/2019
7/24/2019
7/25/2019
7/26/2019
7/27/2019
7/28/2019
7/29/2019
7/30/2019
7/31/2019
8/1/2019
8/2/2019
8/3/2019
8/4/2019
8/5/2019
8/6/2019
8/7/2019
8/8/2019
8/9/2019
8/10/2019
8/11/2019
8/12/2019
8/13/2019
8/14/2019
8/15/2019
8/16/2019
8/17/2019
8/18/2019
8/19/2019
8/20/2019
8/21/2019 0.00
8/22/2019
8/23/2019
8/24/2019
8/25/2019
8/26/2019
8/27/2019
8/28/2019
8/29/2019
8/30/2019
8/31/2019
9/1/2019 0.00 **
9/2/2019 **
9/3/2019 0.00 T
9/4/2019 0.00 **
9/5/2019 0.00 0.04
9/6/2019 0.00
9/7/2019 0.00 **
9/8/2019 0.00 **
9/9/2019 0.09 0.09
9/10/2019
9/11/2019 M
9/12/2019 0.17
9/13/2019 0.00
9/14/2019
9/15/2019
9/16/2019 0.00
9/17/2019 0.00
9/18/2019 0.00
9/19/2019 1.60
9/20/2019 **
9/21/2019 **
9/22/2019 **
9/23/2019 0.00
9/24/2019
9/25/2019
9/26/2019 **
9/27/2019 T
9/28/2019 **
9/29/2019 **
9/30/2019 **



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/2/2018 7:30 AM 0.00 0.0 M M M No signs of any precipitation in rain gage. Partly cloudy with a slight breeze-Angelo
10/5/2018 7:00 AM 0.08 M M M M Chilly, damp, condensation on the outside of the gauge. MrH
10/6/2018 7:00 AM M 0.0 M M M {EDIT: Observer reported 0.00 for new precip. QPE data and surrounding reports of 0.11 to 0.17 indicate this could be a typo. Changed report of 0.00 to NA until observer can be contacted to verify. Submission Time Before EDIT: 10/08/2018 9:21 AM CoCoSTAFF DNT}
10/8/2018 7:00 AM 0.45 0.0 M M M Cold and overcast. Grace W
10/9/2018 7:00 AM 0.37 M M M M Cold, wet and overcast. MrH
10/16/2018 7:00 AM M M M M M Malia Sullivan {EDIT: Observer reported 0.39 for new precip. QPE data and surrounding reports of 0.00's indicate this could be a date error or a multi-day report. Changed report of 0.39 to NA until observer can be contacted to verify. Submission Time Before EDIT: 10/16/2018 7:39 AM CoCoSTAFF DNT}
10/17/2018 7:00 AM T M M M M cold, frosty and clear. MrH -Brandon M
10/18/2018 7:00 AM 0.01 M M M M It’s been getting colder and mildly cloudy, and the grass around the gauge is starting to frost, not a whole lot of precipitation though -James O.
10/19/2018 7:00 AM 0.00 0.0 M M M cool, clear dry MrH
10/23/2018 7:00 AM 0.00 0.0 M M M Dry, mild temperatures. MrH
10/24/2018 7:00 AM 0.00 0.0 M M M Dry, mild breezy. MrH
10/30/2018 7:00 AM 0.00 0.0 M M M Cool, cloudy -Hanna s
10/31/2018 7:00 AM 0.20 M M M M cold, overcast, breezy. MrH
11/5/2018 7:00 AM 0.00 0.0 M M M Cold, dry
11/8/2018 7:00 AM 0.00 0.0 M M M Cold, overcast, foggy. MrH
11/9/2018 7:00 AM 0.00 0.0 M M M Lots of frost but no precipitation
11/13/2018 7:00 AM 0.00 0.0 M M M Moister inside nut no precipitation-AS
11/28/2018 7:00 AM 0.00 0.0 M M M Partly cloudy, cool, dry-Gabe
11/30/2018 7:00 AM 0.10 M M M M Cold, very cloudy and frost on grass -Ryuya
12/4/2018 7:00 AM M 0.0 M M M Cold, clear, frozen rain gauge - Cecily (edit: daily precip changed from 10.00" to NA. PG)
12/11/2018 7:00 AM 0.00 0.0 M M M Cold, clear, mild MrH
12/12/2018 7:00 AM 0.00 0.0 M M M Cool, clear, dry - Cecily
12/13/2018 7:00 AM 0.00 0.0 M M M Cold and clear and dry and MrH
12/14/2018 7:00 AM 0.00 0.0 M M M A slight breeze, bugs in rain gauge, and clear sky’s - Emma Carruthers
1/10/2019 7:00 AM 0.00 0.0 M M M Cold, partly cloudy and dry
1/11/2019 7:00 AM 0.08 M M M M First good rain we’ve had in awhile, still raining even after the reading was taken -James O
1/16/2019 7:00 AM 0.00 0.0 M M M cold and dry. MrH
1/17/2019 7:00 AM 0.00 0.0 M M M
1/18/2019 7:00 AM 0.00 0.0 M M M Cool, dry, overcast. MrH
1/23/2019 7:00 AM 0.00 0.0 M M M Cold, dry and frosty
1/24/2019 7:00 AM 0.02 M M M M Windy, cold, snowing, accumulation from snow melt, Malia Sullivan
1/29/2019 7:00 AM 0.00 0.0 M M M frost in gauge, clear, dry and cold
1/30/2019 7:00 AM T M M M M Cold, clear, frosty Annika T
2/1/2019 7:00 AM 0.00 0.0 M M M No precipitation, but there was mist in the rain gage- Angelo Salazar
3/1/2019 7:00 AM 0.00 0.0 M M M Breezy, chilly Jill S
3/5/2019 7:00 AM 0.00 0.0 M M M Frost on gauge. Very cold, partly cloudy, no wind
3/7/2019 7:00 AM 0.02 M M M M Cold, foggy, overcast, MrH
3/11/2019 7:00 AM 0.01 M M M M It’s been getting warmer recently and the frost and snow is melting -James O
3/12/2019 7:00 AM 0.00 0.0 M M M Cold, overcast. MrH
3/15/2019 7:00 AM M M M M M Clear sky’s with slight frost {EDIT: Observer reported 0.62 for new precip. Surrounding reports of 0.00's indicate a date error or a multi-day report. Changed report of 0.62 to NA until observer can be contacted to verify. Submission Time Before EDIT: 3/15/2019 8:57 AM CoCoSTAFF DNT}
3/21/2019 7:00 AM 0.00 0.0 M M M
4/2/2019 7:00 AM 0.00 0.0 M M M cool, overcast, dry. MrH
4/4/2019 7:00 AM 0.00 0.0 M M M cool, partly cloudy, dew on grass. MrH
4/5/2019 7:00 AM 0.00 0.0 M M M It hasn’t rained a whole lot recently, but we caught a spider in our rain gauge -James O
4/9/2019 12:00 AM 0.00 0.0 M M M Warm, Mildly cloudy -Ryuya
4/12/2019 7:00 AM 0.00 0.0 M M M Cold, cloudy, damp. MrH
4/15/2019 7:00 AM M M M M M Light rainfall this weekend, even a little snow, but it’s still warming up a lot -James O {EDIT: Observer reported 0.07 for new precip. Surrounding reports of 0.00's indicate this could be a date error or a multi-day report. Changed report of 0.07 to NA until observer can be contacted to verify. Submission Time Before EDIT: 4/15/2019 8:05 AM CoCoSTAFF DNT}
4/16/2019 7:00 AM 0.00 0.0 M M M Mild, partly cloudy, dry. MrH
5/1/2019 7:00 AM 0.15 M M M M cold, foggy, misty. MrH
5/2/2019 7:00 AM 0.02 M M M M It rained a little last night and it was a bit brisk this morning, any non-Coloradan would call this weather crazy -James O
5/7/2019 7:00 AM 0.05 M M M M Cool, drizzle and cloudy. MrH
8/21/2019 7:00 AM 0.00 0.0 M M M Mild, overcast, Mr H
9/1/2019 7:00 AM 0.00 0.0 M M M
9/3/2019 8:00 AM 0.00 T T M M Cloudy. Angel Sorry this is daily and should be Multi-day
9/4/2019 7:00 AM 0.00 0.0 M M M Warm, slight coulds
9/5/2019 7:00 AM 0.00 0.0 M M M Cloudy but warm and sunny
9/6/2019 7:00 AM 0.00 0.0 M M M Cool, little coulds but gloomy
9/7/2019 7:00 AM 0.00 0.0 M M M Gloomy
9/8/2019 7:00 AM 0.00 0.0 M M M Nice. Little clouds
9/9/2019 7:00 AM 0.09 M M M M {EDIT: Observer reported 0.00 for new precip but indicated precip in the duration information. Changed report of 0.00 to NA until observer can be contacted to verify. Submission Time Before EDIT: 9/09/2019 12:24 PM CoCoSTAFF DNT}
9/11/2019 7:00 AM M M M M M warm and sunny {EDIT: Observer reported 1.15 for new precip. QPE data and surrounding reports of 0.00 to 0.35 indicate this could be a decimal typo. Changed report of 1.15 to NA until observer can be contacted to verify. Submission Time Before EDIT: 9/11/2019 5:01 PM CoCoSTAFF DNT}
9/12/2019 7:00 AM 0.17 M M M M Clear, sunny and mild
9/13/2019 8:10 AM 0.00 0.0 M M M N/A Angel
9/16/2019 7:00 AM 0.00 0.0 M M M Mild, overcast, dry MH
9/17/2019 7:40 AM 0.00 0.0 M M M Dennis Pozhidaev Overcast: Mild Slight Breeze Around 50deg Fahrenheit
9/18/2019 7:00 AM 0.00 0.0 M M M Cool, dry and clear MrH
9/19/2019 7:50 AM 1.60 0.0 M M M Somewhat cold. Angel Chavez



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
9/29/2018 10/01/2018 7:00 AM 3 0.02 M M Cool, overcast and damp. MrH
10/3/2018 10/04/2018 7:30 AM 2 0.03 M M It was chilly, humid, windy from the N. -Liz
10/10/2018 10/11/2018 7:00 AM 2 0.12 M M Cold, dark, damp and overcast. MrH
10/20/2018 10/22/2018 7:00 AM 3 0.00 M M It’s been getting warmer recently, autumn is starting to feel like spring -James O
10/27/2018 10/29/2018 7:00 AM 3 0.00 M M Mild, dry, overcast. MrH
11/10/2018 11/12/2018 7:00 AM 3 0.11 M M cold, overcast, snowing, contents of gauge frozen. This is the reading after melting MrH
11/16/2018 11/26/2018 7:00 AM 11 0.28 M M Frozen sample, cold, and clear - Cecily
11/27/2018 11/28/2018 7:00 AM 2 0.00 M M Cold and partly cloudy -Ryuya
12/1/2018 12/03/2018 7:00 AM 3 0.06 M M cold, overcast Rowan Granat
12/5/2018 12/10/2018 7:00 AM 6 0.03 M M Water was frozen inside, made for easy measuring, but now how do I get it thawed? -James O
12/15/2018 12/17/2018 7:00 AM 3 0.00 M M cold, dry, empty. MrH
1/1/2019 1/07/2019 7:00 AM 7 0.02 M M Back from break, cool, clear - Cecily K
1/8/2019 1/09/2019 7:00 AM 2 0.00 M M Cold, dry, overcast -Ryuya
1/12/2019 1/14/2019 7:00 AM 3 0.43 M M frozen solid, Will S
1/19/2019 1/22/2019 7:00 AM 4 0.18 M M frozen sample, cold, clear. MrH
1/26/2019 1/28/2019 7:00 AM 3 0.09 3.0 M Snowing, windy, cold. MrH
2/4/2019 2/05/2019 7:00 AM 2 0.00 M M Chilly, sunny, dew in rain gauge. Malia Sullivan
2/9/2019 2/11/2019 7:00 AM 3 0.01 M M Damp, cold, foggy and overcast. MrH
2/12/2019 2/22/2019 7:00 AM 11 0.02 M M cold, snowy overcast. MrH
2/26/2019 2/27/2019 7:00 AM 2 1.30 M M Water frozen in gauge, cold, snowing slightly - Cecily
3/2/2019 3/04/2019 7:00 AM 3 0.27 M M value taken from melted ice. ZV
3/16/2019 3/19/2019 7:00 AM 4 0.00 M M Sunny but chilly.
3/23/2019 4/01/2019 7:00 AM 10 0.28 M M cool, clear, bug in gauge. MrH
4/6/2019 4/08/2019 7:00 AM 3 0.00 M M mild, clear, MrH
4/10/2019 4/11/2019 7:00 AM 2 0.14 0.1 M The rain gauge was frozen solid today, so much so that it’s stuck to the post, but the frozen water made measuring the gauge easier -James O
4/18/2019 4/19/2019 7:00 AM 2 0.20 M M Sunny, slightly humid
4/20/2019 4/22/2019 7:00 AM 3 0.21 M M Chilly, damp and overcast. MrH
4/24/2019 4/25/2019 7:00 AM 2 0.00 M M Clear, Warm, and dew on grass - Cecily Kirschling
4/26/2019 4/30/2019 7:00 AM 5 0.22 M M It snowed over the weekend.
5/4/2019 5/06/2019 7:00 AM 3 0.00 M M It’s been pretty dry recently, although we did catch some bugs in the rain gauge which means warmer weather is coming back soon -James O
5/8/2019 5/20/2019 7:00 AM 13 0.18 M M overcast and chilly
9/1/2019 9/03/2019 7:00 AM 3 T T T Partly cloudy, breezy, sunny- Claudia
9/4/2019 9/05/2019 8:14 AM 2 0.04 M M Katie: clear skies, warm, sunny
9/7/2019 9/09/2019 8:50 AM 3 0.09 M M Katie: sunny, warm, partly cloudy
9/20/2019 9/23/2019 7:00 AM 4 0.00 0.0 M 75% cloudy cold with no wind -Erick F.
9/26/2019 9/27/2019 8:00 AM 2 T T T A bit cold, birds chirping, 15% sky cover- Claudia
9/28/2019 10/01/2019 7:00 AM 4 0.23 M M Cool, cloudy, drizzle MrH



Observation Date Observation Time Notes Largest Stone Size Average Stone Size Smallest Stone Size Stone Consistency Duration Minutes Durration Accuracy Damage Timing More Rain than Hail Hail Started Largest Hail Started Angle of Impact Number of Stones on Pad Distance Between Stones on Pad Depth of Stones on Ground