Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Westminster features a humid subtropical climate (Cfa). Temperatures typically range between 7 °C (44 °F) and 26 °C (80 °F) through the year, but rarely can drop to -11 °C (12 °F) or can rise to as high as 37 °C (98 °F). The average annual precipitation amounts to about 1539 mm (60.6 inches) and receives 133 rainy days on the 1 mm (0.04 inches) threshold annually. Westminster enjoys an average of 3123 hours of sunshine throughout the year, and daylight varies from 9 hours 51 minutes to 14 hours 26 minutes per day.
The warmest months in Westminster are June, July and August, with daily mean temperatures ranging from 24 to 26 °C (76 - 80 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 9 °C (44 - 49 °F) throughout the day. On average each year, Westminster experiences 133 days above 25 °C (77.0 °F) and 29 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 25°C (76°F) |
25°C (78°F) |
30°C (86°F) |
30°C (86°F) |
34°C (94°F) |
34°C (94°F) |
35°C (95°F) |
35°C (96°F) |
35°C (96°F) |
37°C (98°F) |
26°C (79°F) |
24°C (75°F) |
| Mean maximum | 21°C (70°F) |
24°C (75°F) |
27°C (80°F) |
28°C (83°F) |
32°C (90°F) |
32°C (91°F) |
34°C (94°F) |
34°C (93°F) |
33°C (91°F) |
31°C (88°F) |
24°C (75°F) |
21°C (70°F) |
| Average high | 12°C (53°F) |
15°C (59°F) |
18°C (64°F) |
22°C (72°F) |
26°C (79°F) |
29°C (85°F) |
31°C (89°F) |
31°C (87°F) |
28°C (84°F) |
23°C (74°F) |
16°C (62°F) |
13°C (56°F) |
| Daily mean | 7°C (44°F) |
9°C (49°F) |
12°C (54°F) |
16°C (61°F) |
21°C (70°F) |
24°C (76°F) |
26°C (80°F) |
26°C (78°F) |
23°C (74°F) |
18°C (65°F) |
11°C (52°F) |
8°C (47°F) |
| Average low | 2°C (36°F) |
4°C (40°F) |
7°C (44°F) |
10°C (50°F) |
16°C (60°F) |
20°C (68°F) |
22°C (72°F) |
21°C (71°F) |
19°C (66°F) |
13°C (56°F) |
5°C (42°F) |
4°C (39°F) |
| Mean minimum | -7°C (20°F) |
-3°C (27°F) |
-3°C (26°F) |
1°C (34°F) |
7°C (46°F) |
15°C (60°F) |
18°C (64°F) |
18°C (64°F) |
13°C (56°F) |
4°C (40°F) |
-2°C (29°F) |
-3°C (27°F) |
| Minimum | -11°C (12°F) |
-4°C (24°F) |
-5°C (24°F) |
-1°C (30°F) |
5°C (41°F) |
12°C (53°F) |
16°C (61°F) |
16°C (61°F) |
10°C (50°F) |
1°C (33°F) |
-4°C (24°F) |
-7°C (19°F) |
Compare temperature, precipitation, sunshine, UV index in Westminster, South Carolina, United States with other places around the world.
Westminster usually has the most precipitation in February, October and December, with an average of 10 rainy days and 162 mm (6.4 inches) of precipitation per month. The driest months in Westminster are June, July and November. On average, 94 mm (3.7 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 117 (4.6) | 167 (6.6) | 121 (4.7) | 136 (5.4) | 141 (5.5) | 92 (3.6) | 92 (3.6) | 127 (5.0) | 132 (5.2) | 167 (6.6) | 97 (3.8) | 151 (6.0) |
| Average precipitation days (≥ 1 mm) | 9 | 12 | 12 | 9 | 11 | 14 | 15 | 13 | 9 | 10 | 9 | 10 |
The sunniest months in Westminster are June, July and August, when the sun shines an average of 10 hours 38 minutes a day. Least sunny months in Westminster: January, February and December receive an average of 5 hours 52 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 167 | 172 | 238 | 273 | 302 | 318 | 345 | 314 | 291 | 267 | 236 | 193 |
| Mean daily daylight hours | 10h 6m | 10h 56m | 11h 59m | 13h 4m | 13h 59m | 14h 26m | 14h 11m | 13h 23m | 12h 20m | 11h 15m | 10h 19m | 9h 51m |
Westminster experiences the highest level of ultraviolet (UV) radiation in April, May and July, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Westminster UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 4 | 7 | 8 | 11 | 11 | 11 | 11 | 10 | 9 | 8 | 6 | 4 |
Discover in-depth weather details for every month in Westminster. 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 Westminster'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.