Boulder, CO 14-Day Forecast
Colorado, United States 🇺🇸
71°
Cloudy right now
Today: high 75°, low 49°
Updated just now
Boulder weather for the next 14 days
Wednesday, September 16
Overcast High 77° Low 54°Precipitation
12%
· 0.0 in
Max wind
8 mph
Humidity
49%
UV index
5 - Moderate
Sunrise / sunset
06:43 AM / 07:08 PM
Thursday, September 17
Overcast High 76° Low 61°Precipitation
23%
· 0.01 in
Max wind
6 mph
Humidity
50%
UV index
6 - Moderate
Sunrise / sunset
06:44 AM / 07:07 PM
Friday, September 18
Overcast High 80° Low 56°Precipitation
57%
· 0.05 in
Max wind
13 mph
Humidity
56%
UV index
7 - High
Sunrise / sunset
06:45 AM / 07:05 PM
Saturday, September 19
Sunny High 76° Low 55°Precipitation
57%
· 0.1 in
Max wind
14 mph
Humidity
51%
UV index
7 - High
Sunrise / sunset
06:45 AM / 07:03 PM
Sunday, September 20
Sunny High 76° Low 51°Precipitation
17%
· 0.01 in
Max wind
11 mph
Humidity
44%
UV index
6 - High
Sunrise / sunset
06:46 AM / 07:02 PM
Monday, September 21
Overcast High 76° Low 51°Precipitation
57%
· 0.09 in
Max wind
8 mph
Humidity
35%
UV index
6 - High
Sunrise / sunset
06:47 AM / 07:00 PM
Tuesday, September 22
Sunny High 79° Low 52°Precipitation
17%
· 0.01 in
Max wind
11 mph
Humidity
32%
UV index
7 - High
Sunrise / sunset
06:48 AM / 06:58 PM
Wednesday, September 23
Sunny High 74° Low 44°Precipitation
1%
· 0.0 in
Max wind
9 mph
Humidity
33%
UV index
6 - High
Sunrise / sunset
06:49 AM / 06:57 PM
Thursday, September 24
Sunny High 77° Low 42°Precipitation
0%
· 0.0 in
Max wind
9 mph
Humidity
22%
UV index
6 - High
Sunrise / sunset
06:50 AM / 06:55 PM
Friday, September 25
Sunny High 86° Low 53°Precipitation
0%
· 0.0 in
Max wind
12 mph
Humidity
19%
UV index
7 - High
Sunrise / sunset
06:51 AM / 06:53 PM
Saturday, September 26
Overcast High 55° Low 45°Precipitation
15%
· 0.0 in
Max wind
8 mph
Humidity
71%
UV index
3 - Moderate
Sunrise / sunset
06:52 AM / 06:52 PM
Sunday, September 27
Sunny High 64° Low 40°Precipitation
8%
· 0.0 in
Max wind
9 mph
Humidity
63%
UV index
5 - Moderate
Sunrise / sunset
06:53 AM / 06:50 PM
Monday, September 28
Sunny High 81° Low 45°Precipitation
3%
· 0.0 in
Max wind
19 mph
Humidity
26%
UV index
6 - High
Sunrise / sunset
06:54 AM / 06:48 PM
Boulder 14-day outlook: the story
The warmest day of Boulder's 14-day outlook is Friday, September 25 with a high near 86°F (30°C); the coolest night comes Sunday, September 27, dipping to 40°F (4°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 77°F (25°C), right in line with the typical September high of 78°F (26°C).
Precipitation is most likely on Tuesday 15, Friday 18, Saturday 19, Monday 21; the wettest day looks like Saturday, September 19 with about 0.1 in (2.5 mm) expected. For the weekend, expect Saturday 76°F (24°C) and sunny / Sunday 76°F (25°C) and sunny.
For typical conditions month by month, see the Boulder climate & average temperatures guide.
Boulder forecast questions
Will it rain in Boulder this week?
The forecast currently shows meaningful precipitation chances on 4 of the next 14 days, peaking around Saturday, September 19.
What will be the warmest day in Boulder over the next 14 days?
Friday, September 25, with a forecast high near 86°F (30°C).
How accurate is a 14-day forecast for Boulder?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Boulder by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 38° | 17° | 6 | 1.0 in | 7.9 h/day | 61% |
| February | 39° | 15° | 7 | 1.4 in | 9.1 h/day | 61% |
| March | 49° | 24° | 8 | 2.1 in | 10.1 h/day | 61% |
| April | 57° | 31° | 10 | 2.3 in | 10.9 h/day | 58% |
| May | 65° | 41° | 15 | 4.6 in | 11.7 h/day | 64% |
| June | 80° | 54° | 8 | 1.9 in | 13.0 h/day | 52% |
| July | 85° | 59° | 9 | 1.5 in | 13.1 h/day | 50% |
| August | 83° | 58° | 8 | 1.4 in | 12.3 h/day | 50% |
| September | 78° | 52° | 6 | 1.0 in | 11.2 h/day | 47% |
| October | 63° | 38° | 6 | 1.3 in | 9.7 h/day | 53% |
| November | 49° | 27° | 6 | 1.3 in | 8.5 h/day | 57% |
| December | 42° | 20° | 5 | 0.9 in | 7.8 h/day | 56% |
14-day forecasts nearby