St. Louis, MO 14-Day Forecast
Missouri, United States 🇺🇸
102°
Sunny right now
Today: high 102°, low 77°
Updated 2 hours ago
St. Louis weather for the next 14 days
Thursday, August 13
Sunny High 98° Low 71°Precipitation
17%
· 0.01 in
Max wind
11 mph
Humidity
68%
UV index
8 - High
Sunrise / sunset
06:13 AM / 07:58 PM
Friday, August 14
Sunny High 102° Low 75°Precipitation
57%
· 0.14 in
Max wind
9 mph
Humidity
61%
UV index
8 - Very High
Sunrise / sunset
06:14 AM / 07:56 PM
Saturday, August 15
Sunny High 105° Low 82°Precipitation
1%
· 0.0 in
Max wind
11 mph
Humidity
39%
UV index
8 - High
Sunrise / sunset
06:15 AM / 07:55 PM
Sunday, August 16
Sunny High 98° Low 75°Precipitation
57%
· 0.14 in
Max wind
12 mph
Humidity
52%
UV index
9 - Very High
Sunrise / sunset
06:15 AM / 07:54 PM
Monday, August 17
Sunny High 86° Low 70°Precipitation
72%
· 0.29 in
Max wind
8 mph
Humidity
78%
UV index
7 - High
Sunrise / sunset
06:16 AM / 07:52 PM
Tuesday, August 18
Sunny High 89° Low 67°Precipitation
4%
· 0.0 in
Max wind
8 mph
Humidity
64%
UV index
8 - Very High
Sunrise / sunset
06:17 AM / 07:51 PM
Wednesday, August 19
Sunny High 110° Low 71°Precipitation
2%
· 0.0 in
Max wind
15 mph
Humidity
51%
UV index
10 - Very High
Sunrise / sunset
06:18 AM / 07:50 PM
Thursday, August 20
Sunny High 103° Low 82°Precipitation
36%
· 0.01 in
Max wind
14 mph
Humidity
40%
UV index
9 - Very High
Sunrise / sunset
06:19 AM / 07:48 PM
Friday, August 21
Sunny High 80° Low 67°Precipitation
7%
· 0.0 in
Max wind
14 mph
Humidity
66%
UV index
7 - High
Sunrise / sunset
06:20 AM / 07:47 PM
Saturday, August 22
Sunny High 86° Low 62°Precipitation
3%
· 0.0 in
Max wind
9 mph
Humidity
61%
UV index
7 - High
Sunrise / sunset
06:21 AM / 07:46 PM
Sunday, August 23
Sunny High 91° Low 65°Precipitation
3%
· 0.0 in
Max wind
11 mph
Humidity
58%
UV index
8 - Very High
Sunrise / sunset
06:22 AM / 07:44 PM
Monday, August 24
Sunny High 92° Low 67°Precipitation
2%
· 0.0 in
Max wind
10 mph
Humidity
53%
UV index
8 - Very High
Sunrise / sunset
06:23 AM / 07:43 PM
Tuesday, August 25
Sunny High 98° Low 67°Precipitation
2%
· 0.0 in
Max wind
10 mph
Humidity
48%
UV index
9 - Very High
Sunrise / sunset
06:23 AM / 07:41 PM
St. Louis 14-day outlook: the story
The warmest day of St. Louis's 14-day outlook is Wednesday, August 19 with a high near 110°F (43°C); the coolest night comes Saturday, August 22, dipping to 62°F (17°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 97°F (36°C), about 12°F (7°C) above the typical August high of 85°F (30°C).
Precipitation is most likely on Friday 14, Sunday 16, Monday 17; the wettest day looks like Monday, August 17 with about 0.29 in (7.5 mm) expected. For the weekend, expect Saturday 105°F (40°C) and sunny / Sunday 98°F (36°C) and sunny.
For typical conditions month by month, see the St. Louis climate & average temperatures guide.
St. Louis forecast questions
Will it rain in St. Louis this week?
The forecast currently shows meaningful precipitation chances on 3 of the next 14 days, peaking around Monday, August 17.
What will be the warmest day in St. Louis over the next 14 days?
Wednesday, August 19, with a forecast high near 110°F (43°C).
How accurate is a 14-day forecast for St. Louis?
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 St. Louis by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 41° | 25° | 9 | 3.2 in | 5.7 h/day | 69% |
| February | 46° | 27° | 8 | 2.7 in | 7.1 h/day | 66% |
| March | 57° | 38° | 13 | 5.5 in | 7.5 h/day | 67% |
| April | 66° | 46° | 11 | 5.0 in | 9.0 h/day | 65% |
| May | 76° | 58° | 14 | 5.4 in | 10.2 h/day | 71% |
| June | 86° | 67° | 11 | 4.5 in | 11.6 h/day | 68% |
| July | 88° | 71° | 13 | 6.9 in | 11.8 h/day | 73% |
| August | 85° | 69° | 13 | 5.4 in | 11.0 h/day | 74% |
| September | 82° | 63° | 8 | 4.7 in | 10.2 h/day | 69% |
| October | 69° | 51° | 9 | 3.6 in | 8.1 h/day | 67% |
| November | 55° | 38° | 9 | 3.3 in | 7.0 h/day | 69% |
| December | 47° | 31° | 8 | 3.2 in | 6.0 h/day | 71% |
14-day forecasts nearby