Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Webster Groves features a humid subtropical climate (Cfa). Temperatures typically range between 0 °C (33 °F) and 27 °C (80 °F) through the year, but rarely can drop to -21 °C (-5 °F) or can rise to as high as 38 °C (102 °F). The average annual precipitation amounts to about 1198 mm (47.1 inches) and receives 122 rainy days on the 1 mm (0.04 inches) threshold annually. Webster Groves enjoys an average of 2989 hours of sunshine throughout the year, and daylight varies from 9 hours 30 minutes to 14 hours 47 minutes per day.
The warmest months in Webster Groves are June, July and August, with daily mean temperatures ranging from 25 to 27 °C (77 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 4 °C (33 - 40 °F) throughout the day. On average each year, Webster Groves experiences 123 days above 25 °C (77.0 °F) and 73 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 20°C (68°F) |
25°C (77°F) |
28°C (82°F) |
31°C (88°F) |
34°C (94°F) |
36°C (97°F) |
38°C (102°F) |
36°C (96°F) |
35°C (95°F) |
34°C (94°F) |
25°C (78°F) |
23°C (74°F) |
| Mean maximum | 17°C (63°F) |
21°C (70°F) |
25°C (77°F) |
29°C (84°F) |
32°C (90°F) |
34°C (93°F) |
36°C (97°F) |
35°C (95°F) |
34°C (93°F) |
32°C (90°F) |
23°C (73°F) |
20°C (69°F) |
| Average high | 5°C (41°F) |
7°C (46°F) |
14°C (57°F) |
18°C (65°F) |
25°C (77°F) |
30°C (86°F) |
31°C (89°F) |
30°C (85°F) |
28°C (83°F) |
21°C (70°F) |
12°C (55°F) |
9°C (49°F) |
| Daily mean | 0°C (33°F) |
2°C (36°F) |
8°C (48°F) |
13°C (56°F) |
20°C (68°F) |
25°C (77°F) |
27°C (80°F) |
25°C (77°F) |
23°C (73°F) |
15°C (60°F) |
7°C (45°F) |
4°C (40°F) |
| Average low | -3°C (26°F) |
-3°C (28°F) |
4°C (39°F) |
8°C (46°F) |
15°C (59°F) |
20°C (68°F) |
22°C (72°F) |
20°C (68°F) |
17°C (63°F) |
10°C (51°F) |
2°C (36°F) |
-1°C (31°F) |
| Mean minimum | -15°C (5°F) |
-14°C (6°F) |
-8°C (18°F) |
-1°C (31°F) |
7°C (44°F) |
15°C (60°F) |
17°C (64°F) |
15°C (59°F) |
9°C (49°F) |
0°C (33°F) |
-7°C (20°F) |
-10°C (14°F) |
| Minimum | -21°C (-5°F) |
-19°C (-2°F) |
-16°C (3°F) |
-4°C (25°F) |
4°C (40°F) |
12°C (54°F) |
16°C (61°F) |
12°C (55°F) |
7°C (46°F) |
-3°C (26°F) |
-12°C (10°F) |
-16°C (3°F) |
Compare temperature, precipitation, sunshine, UV index in Webster Groves, Missouri, United States with other places around the world.
Webster Groves usually has the most precipitation in March, April and May, with an average of 12 rainy days and 139 mm (5.5 inches) of precipitation per month. The driest months in Webster Groves are September, November and December. On average, 66 mm (2.6 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 79 (3.1) | 82 (3.2) | 134 (5.3) | 135 (5.3) | 146 (5.7) | 94 (3.7) | 92 (3.6) | 131 (5.1) | 58 (2.3) | 107 (4.2) | 75 (3.0) | 64 (2.5) |
| Average precipitation days (≥ 1 mm) | 8 | 10 | 12 | 11 | 14 | 11 | 10 | 12 | 7 | 11 | 9 | 7 |
The sunniest months in Webster Groves are June, July and August, when the sun shines an average of 10 hours 55 minutes a day. Least sunny months in Webster Groves: January, February and December receive an average of 5 hours 29 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 127 | 176 | 207 | 239 | 289 | 328 | 348 | 328 | 291 | 242 | 214 | 195 |
| Mean daily daylight hours | 9h 48m | 10h 45m | 11h 58m | 13h 13m | 14h 16m | 14h 47m | 14h 30m | 13h 34m | 12h 22m | 11h 8m | 10h 3m | 9h 30m |
Webster Groves experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly Webster Groves UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 3 | 5 | 7 | 9 | 10 | 11 | 10 | 10 | 9 | 7 | 5 | 3 |
Discover in-depth weather details for every month in Webster Groves. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Webster Groves's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.