Humid subtropical climate
Climate Boulder - Colorado
Annual high65ºF
Annual low38ºF
Precipitation20.68 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 47 | 22 | 0.76 | 11 |
| Feb | 48 | 23 | 0.82 | 12 |
| Mar | 56 | 29 | 2.19 | 18 |
| Apr | 63 | 36 | 2.87 | 12 |
| May | 72 | 44 | 2.80 | 1 |
| Jun | 82 | 51 | 2.20 | 0 |
| Jul | 88 | 57 | 1.79 | 0 |
| Aug | 85 | 56 | 1.84 | 0 |
| Sep | 78 | 48 | 1.68 | 1 |
| Oct | 66 | 38 | 1.55 | 6 |
| Nov | 54 | 29 | 1.24 | 14 |
| Dec | 45 | 21 | 0.94 | 14 |
- JanHigh 47ºFLow 22ºFPrecip 0.76 inch
- FebHigh 48ºFLow 23ºFPrecip 0.82 inch
- MarHigh 56ºFLow 29ºFPrecip 2.19 inch
- AprHigh 63ºFLow 36ºFPrecip 2.87 inch
- MayHigh 72ºFLow 44ºFPrecip 2.80 inch
- JunHigh 82ºFLow 51ºFPrecip 2.20 inch
- JulHigh 88ºFLow 57ºFPrecip 1.79 inch
- AugHigh 85ºFLow 56ºFPrecip 1.84 inch
- SepHigh 78ºFLow 48ºFPrecip 1.68 inch
- OctHigh 66ºFLow 38ºFPrecip 1.55 inch
- NovHigh 54ºFLow 29ºFPrecip 1.24 inch
- DecHigh 45ºFLow 21ºFPrecip 0.94 inch
Climate summary
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 weather averages
Annual high65ºF
Annual low38ºF
Precipitation20.68 inch
Snowfall89 inch
Daily normals Boulder - Colorado - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 46.3 | 20.9 | 0.03 | 0.03 | 0.40 | 0.40 |
| Jan 2 | 46.4 | 21.0 | 0.05 | 0.05 | 0.80 | 0.80 |
| Jan 3 | 46.5 | 21.1 | 0.08 | 0.08 | 1.10 | 1.10 |
| Jan 4 | 46.6 | 21.1 | 0.10 | 0.10 | 1.50 | 1.50 |
| Jan 5 | 46.7 | 21.2 | 0.13 | 0.13 | 1.80 | 1.80 |
| Jan 6 | 46.8 | 21.3 | 0.15 | 0.15 | 2.10 | 2.10 |
| Jan 7 | 46.9 | 21.4 | 0.18 | 0.18 | 2.50 | 2.50 |
| Jan 8 | 46.9 | 21.4 | 0.20 | 0.20 | 2.80 | 2.80 |
| Jan 9 | 47.0 | 21.5 | 0.22 | 0.22 | 3.10 | 3.10 |
| Jan 10 | 47.1 | 21.5 | 0.25 | 0.25 | 3.40 | 3.40 |
| Jan 11 | 47.1 | 21.6 | 0.27 | 0.27 | 3.80 | 3.80 |
| Jan 12 | 47.2 | 21.6 | 0.29 | 0.29 | 4.10 | 4.10 |
| Jan 13 | 47.2 | 21.7 | 0.32 | 0.32 | 4.40 | 4.40 |
| Jan 14 | 47.2 | 21.7 | 0.34 | 0.34 | 4.70 | 4.70 |
| Jan 15 | 47.3 | 21.7 | 0.36 | 0.36 | 5.00 | 5.00 |
| Jan 16 | 47.3 | 21.7 | 0.39 | 0.39 | 5.40 | 5.40 |
| Jan 17 | 47.3 | 21.7 | 0.42 | 0.42 | 5.70 | 5.70 |
| Jan 18 | 47.3 | 21.7 | 0.44 | 0.44 | 6.10 | 6.10 |
| Jan 19 | 47.3 | 21.7 | 0.47 | 0.47 | 6.40 | 6.40 |
| Jan 20 | 47.2 | 21.7 | 0.50 | 0.50 | 6.80 | 6.80 |
| Jan 21 | 47.2 | 21.7 | 0.53 | 0.53 | 7.20 | 7.20 |
| Jan 22 | 47.2 | 21.7 | 0.56 | 0.56 | 7.60 | 7.60 |
| Jan 23 | 47.1 | 21.7 | 0.59 | 0.59 | 8.00 | 8.00 |
| Jan 24 | 47.1 | 21.6 | 0.62 | 0.62 | 8.40 | 8.40 |
| Jan 25 | 47.1 | 21.6 | 0.65 | 0.65 | 8.80 | 8.80 |
| Jan 26 | 47.0 | 21.6 | 0.68 | 0.68 | 9.20 | 9.20 |
| Jan 27 | 47.0 | 21.5 | 0.70 | 0.70 | 9.60 | 9.60 |
| Jan 28 | 47.0 | 21.5 | 0.73 | 0.73 | 10.00 | 10.00 |
| Jan 29 | 46.9 | 21.5 | 0.77 | 0.77 | 10.40 | 10.40 |
| Jan 30 | 46.9 | 21.4 | 0.80 | 0.80 | 10.90 | 10.90 |
| Jan 31 | 46.9 | 21.4 | 0.83 | 0.83 | 11.30 | 11.30 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Boulder - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 73.0 | 48.9 | 0.00 |
| Oct 2 | 82.9 | 43.0 | 0.00 |
| Oct 3 | 84.9 | 51.1 | 0.00 |
| Oct 4 | – | – | – |
| Oct 5 | – | – | – |
| Oct 6 | – | – | – |
| Oct 7 | 81.0 | 52.0 | 0.00 |
| Oct 8 | 86.0 | 52.0 | 0.00 |
| Oct 9 | 86.0 | 51.1 | T |
| Oct 10 | 84.0 | 57.9 | T |
| Oct 11 | 78.1 | 59.0 | 0.00 |
| Oct 12 | 82.9 | 55.9 | 0.00 |
| Oct 13 | 73.0 | 48.9 | 0.13 |
| Oct 14 | 57.9 | 44.1 | 1.37 |
| Oct 15 | 54.0 | 42.1 | 0.17 |
| Oct 16 | 48.9 | 30.9 | 0.00 |
| Oct 17 | 77.0 | 34.0 | 0.00 |
| Oct 18 | 75.9 | 30.9 | 0.00 |
| Oct 19 | – | – | – |
| Oct 20 | – | – | – |
| Oct 21 | – | – | – |
| Oct 22 | 71.1 | 53.1 | T |
| Oct 23 | 79.0 | 52.0 | 0.00 |
| Oct 24 | 66.9 | 45.0 | 0.00 |
| Oct 25 | 57.0 | 36.0 | T |
| Oct 26 | 57.0 | 39.9 | 0.36 |
| Oct 27 | 62.1 | 33.1 | 0.00 |
| Oct 28 | 70.0 | 37.0 | 0.00 |
| Oct 29 | 63.0 | 35.1 | 0.00 |
| Oct 30 | – | – | – |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature86.0ºF · Oct 8
- Lowest max temperature48.9ºF · Oct 16
- Highest min temperature59.0ºF · Oct 11
- Lowest min temperature30.9ºF · Oct 16
Geo Boulder - Colorado
Location
- Country
- United States
- State
- Colorado
- County
- –
- City
- Boulder
- Zip Code
- 80301
- Elevation
- 5328 ft
- Longitude
- -105.27
- Latitude
- 40.02
- ICAO
- –
- IATA
- –