Climate Boulder - Colorado
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 47 | 48 | 56 | 63 | 72 | 82 |
| Average low in ºF Av. low Lo | 22 | 23 | 29 | 36 | 44 | 51 |
| Av. precipitation in inch Av. precip. Pre. | 0.76 | 0.82 | 2.19 | 2.87 | 2.80 | 2.20 |
| Av. snowfall in inch Snowfall Sn | 11 | 12 | 18 | 12 | 1 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 88 | 85 | 78 | 66 | 54 | 45 |
| Average low in ºF Av. low Lo | 57 | 56 | 48 | 38 | 29 | 21 |
| Av. precipitation in inch Av. precip. Pre. | 1.79 | 1.84 | 1.68 | 1.55 | 1.24 | 0.94 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 1 | 6 | 14 | 14 |
What is the average weather in Boulder, Colorado?
Boulder experiences a humid subtropical climate, characterized by very strong seasonal temperature contrasts. Winters are cold and bring very snowy conditions, with significant snowfall. Spring is the wettest season, while winters are the driest. Summers are warm, and heavy seasonal downpours or afternoon thunderstorms can sometimes occur during the warmer months.
Boulder Climate Graph - Colorado Climate Chart
Daily normals Boulder - Colorado - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 46.3 | 20.9 | 0.03 | 0.03 | 0.40 | 0.40 |
| 2 Jan | 46.4 | 21.0 | 0.05 | 0.05 | 0.80 | 0.80 |
| 3 Jan | 46.5 | 21.1 | 0.08 | 0.08 | 1.10 | 1.10 |
| 4 Jan | 46.6 | 21.1 | 0.10 | 0.10 | 1.50 | 1.50 |
| 5 Jan | 46.7 | 21.2 | 0.13 | 0.13 | 1.80 | 1.80 |
| 6 Jan | 46.8 | 21.3 | 0.15 | 0.15 | 2.10 | 2.10 |
| 7 Jan | 46.9 | 21.4 | 0.18 | 0.18 | 2.50 | 2.50 |
| 8 Jan | 46.9 | 21.4 | 0.20 | 0.20 | 2.80 | 2.80 |
| 9 Jan | 47.0 | 21.5 | 0.22 | 0.22 | 3.10 | 3.10 |
| 10 Jan | 47.1 | 21.5 | 0.25 | 0.25 | 3.40 | 3.40 |
| 11 Jan | 47.1 | 21.6 | 0.27 | 0.27 | 3.80 | 3.80 |
| 12 Jan | 47.2 | 21.6 | 0.29 | 0.29 | 4.10 | 4.10 |
| 13 Jan | 47.2 | 21.7 | 0.32 | 0.32 | 4.40 | 4.40 |
| 14 Jan | 47.2 | 21.7 | 0.34 | 0.34 | 4.70 | 4.70 |
| 15 Jan | 47.3 | 21.7 | 0.36 | 0.36 | 5.00 | 5.00 |
| 16 Jan | 47.3 | 21.7 | 0.39 | 0.39 | 5.40 | 5.40 |
| 17 Jan | 47.3 | 21.7 | 0.42 | 0.42 | 5.70 | 5.70 |
| 18 Jan | 47.3 | 21.7 | 0.44 | 0.44 | 6.10 | 6.10 |
| 19 Jan | 47.3 | 21.7 | 0.47 | 0.47 | 6.40 | 6.40 |
| 20 Jan | 47.2 | 21.7 | 0.50 | 0.50 | 6.80 | 6.80 |
| 21 Jan | 47.2 | 21.7 | 0.53 | 0.53 | 7.20 | 7.20 |
| 22 Jan | 47.2 | 21.7 | 0.56 | 0.56 | 7.60 | 7.60 |
| 23 Jan | 47.1 | 21.7 | 0.59 | 0.59 | 8.00 | 8.00 |
| 24 Jan | 47.1 | 21.6 | 0.62 | 0.62 | 8.40 | 8.40 |
| 25 Jan | 47.1 | 21.6 | 0.65 | 0.65 | 8.80 | 8.80 |
| 26 Jan | 47.0 | 21.6 | 0.68 | 0.68 | 9.20 | 9.20 |
| 27 Jan | 47.0 | 21.5 | 0.70 | 0.70 | 9.60 | 9.60 |
| 28 Jan | 47.0 | 21.5 | 0.73 | 0.73 | 10.00 | 10.00 |
| 29 Jan | 46.9 | 21.5 | 0.77 | 0.77 | 10.40 | 10.40 |
| 30 Jan | 46.9 | 21.4 | 0.80 | 0.80 | 10.90 | 10.90 |
| 31 Jan | 46.9 | 21.4 | 0.83 | 0.83 | 11.30 | 11.30 |
Weather history Boulder - September 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Sep | 90.0 | 57.9 | 0.02 | 0.00 | 0.0 |
| 02 Sep | 90.0 | 59.0 | 0.00 | 0.00 | 0.0 |
| 03 Sep | 91.9 | 57.0 | 0.00 | 0.00 | 9.0 |
| 04 Sep | 93.9 | 55.9 | 0.00 | 0.00 | 0.0 |
| 05 Sep | 95.0 | 60.1 | T | 0.00 | 0.0 |
| 06 Sep | 89.1 | 59.0 | T | 0.00 | 0.0 |
| 07 Sep | 88.0 | 61.0 | 0.05 | 0.00 | 0.0 |
| 08 Sep | 84.0 | 57.9 | 0.01 | 0.00 | 0.0 |
| 09 Sep | 81.0 | 54.0 | 0.00 | 0.00 | 0.0 |
| 10 Sep | 89.1 | 50.0 | 0.00 | 0.00 | 0.0 |
| 11 Sep | 93.0 | 57.9 | 0.00 | 0.00 | 0.0 |
| 12 Sep | 84.9 | 51.1 | T | 0.00 | 0.0 |
| 13 Sep | 95.0 | 52.0 | 0.00 | 0.00 | 0.0 |
| 14 Sep | - | - | - | - | - |
| 15 Sep | - | - | - | - | - |
| 16 Sep | 81.0 | 48.9 | 0.05 | 0.00 | 0.0 |
| 17 Sep | 75.0 | 62.1 | 0.07 | 0.00 | 0.0 |
| 18 Sep | 82.9 | 57.9 | 0.02 | 0.00 | 0.0 |
| 19 Sep | - | - | - | - | - |
| 20 Sep | - | - | - | - | - |
| 21 Sep | - | - | - | - | - |
| 22 Sep | - | - | - | - | - |
| 23 Sep | - | - | - | - | - |
| 24 Sep | - | - | - | - | - |
| 25 Sep | - | - | - | - | - |
| 26 Sep | - | - | - | - | - |
| 27 Sep | - | - | - | - | - |
| 28 Sep | - | - | - | - | - |
| 29 Sep | - | - | - | - | - |
| 30 Sep | - | - | - | - | - |
Past weather Boulder
| Sep 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 87.7 ºF | 47 ºF | |
| Average low temperature Av. low temp. | 56.4 ºF | 22 ºF | |
| Total precipitation Total precip. | 0.22 inch | 0.76 inch | |
| Total snowfall Total snowfall | 0.00 inch | 11 inch | |
| Highest max temperature Highest max temp. | 95.0 ºF | - | |
| Lowest max temperature Lowest max temp. | 75.0 ºF | - | |
| Highest min temperature Highest min temp. | 62.1 ºF | - | |
| Lowest min temperature Lowest min temp. | 48.9 ºF | - | |
Past weather September 2026 incomplete - Missing data
Geo Boulder - Colorado
| Country | United States | |
|---|---|---|
| State | Colorado | |
| County | - | |
| City | Boulder | |
| Zip Code | 80301 | |
| Longitude | -105.27 dec. degr. | |
| Latitude | 40.02 dec. degr. | |
| Altitude - Elevation | 5328ft | |
| ICAO | - | |
| IATA | - |
Date and Time Boulder - Colorado
| Local Time | 02:07 AM | |
|---|---|---|
| Sunrise | 06:48 AM | |
| Sunset | 06:58 PM | |
| Day/Night | Night | |
| Timezone | Mountain Daylight Time | |
| Timezone DB | America - Denver |
Map of Boulder - Colorado
USGS National Map — Open interactive map
Boulder weather averages
| Annual high temperature | 65ºF |
| Annual low temperature | 38ºF |
| Average annual precip. | 20.68 inch |
| Av. annual snowfall | 89 inch |
Station Data
Monthly averages Boulder
Longitude: -105.271, Latitude: 40.015
Average weather Boulder, CO - 80301
Monthly: 1991-2020 normals
History: 2008-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...