St. Louis, MO weather in April
Expect mild weather with frequent rain in St. Louis in April, with highs near 68°F and lows near 47°F. Rain falls on about 12 days. Good for outdoor plans.
- Normal high
- 68°F
- Normal low
- 47°F
- Wet days
- 12
- 4.7 in total
- Muggy days
- 0
- dew point 65°F+
How April changes from start to finish
| April 1 | April 30 | |
|---|---|---|
| Normal high | 63°F | 73°F |
| Normal low | 42°F | 52°F |
| Chance of a wet day | 37% | 41% |
| Sunrise / sunset | 6:45 am / 7:23 pm | 6:04 am / 7:51 pm |
| Daylight | 12.6 h | 13.8 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical April day
- 6 am51°Fdew point 42°F
- 9 am57°Fdew point 43°F
- Noon63°Fdew point 44°F
- 3 pm65°Fdew point 44°F
- 6 pm63°Fdew point 43°F
- 9 pm58°Fdew point 44°F
NOAA hourly normals (local standard time) from St Louis Lambert Intl Airport (13 mi away); average wind 10 mph; clear or few clouds in 26% of daytime hours, mostly cloudy or overcast in 58%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F13 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow12 of 30
- Notable rainat least 0.10 in8 of 30
- Freezing nightslow 32°F or below1 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per April, counted from daily records for each year 1991-2020.
Rain and snow in April
Normal precipitation is 4.7 in; a dry April brings about 3.0 in and a wet one about 6.0 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more. Normal snowfall is 0.2 in.
How April varies from year to year
- Warmest April, 1991-20202010: average high 75°F
- Coolest April2018: average high 61°F
- Wettest April2017: 10.4 in
- Driest April2000: 1.8 in
- Highest reading93°F (April 18, 2002)
- Lowest reading23°F (April 7, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
April compared with March and May
| March | April | May | |
|---|---|---|---|
| Normal high | 57°F | 68°F | 77°F |
| Normal low | 37°F | 47°F | 58°F |
| Wet days | 11 | 12 | 13 |
| Comfortable days | 8 | 13 | 12 |
| Daylight | 12.0 h | 13.2 h | 14.3 h |
Highs change by +11°F from March and +9°F into May.
Nearby alternatives in April
- Warmer: Memphis, TN240 mi · high 73°F · 10 wet days
- Cooler: Davenport, IA201 mi · high 63°F · 11 wet days
How St. Louis ranks in April
- Normal high196th warmest of 378 cities; 3rd of 7 in Missouri
- Wet days293rd driest of 378
- Comfortable days130th most of 340
What to pack for St. Louis in April
- A rain jacket or umbrella – rain on about 12 days
Frost in April
The last spring frost typically comes around Apr 8; in 1 year in 10 it comes after Apr 23. All frost dates for St. Louis.
Heating and cooling
April has 262 heating degree days and 37 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How cold is St. Louis in April?
The normal high is 68°F and the normal low is 47°F. From 1991 to 2020 the coldest April reading was 23°F (April 7, 2007).
Does it rain a lot in St. Louis in April?
About 12 days in April have at least 0.01 in of precipitation, and the normal total is 4.7 in. The wettest April in 1991-2020 was in 2017 (10.4 in); the driest was in 2000 (1.8 in).
Does it snow in St. Louis in April?
Yes. Normal snowfall in April is 0.2 in.
Is April a good time to visit St. Louis?
April ranks 1st of 12 months on our comfort score for St. Louis (67 out of 100). It has about 13 comfortable days. The best months are April and May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, humidity and wind by hour and cloud cover: St Louis Lambert Intl Airport (USW00013994), 13 mi NW of the city center, 531 ft (67 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Frost dates: Cahokia St Louis Airport (USW00003960), 4.4 mi SSE of the city center, 413 ft (51 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Lambert-St Louis International Airport (724340-13994), 13 mi NW of the city center, 531 ft (67 ft higher than the city). Hourly observations, 1991-2020.