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

Today

Sunny High 102° Low 77°
Precipitation
5% · 0.0 in
16 mph
8 - Very High
Sunrise / sunset
06:12 AM / 07:59 PM

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

Monthly averages for St. Louis based on 2015–2024 weather data.
MonthHighLow Rain daysPrecipitation SunshineHumidity
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