St. Charles, Maryland Climate
United States
Pop. 33,379 Elev. 65 m / 213 ft
TZ: America/New_York (UTC-4) ·
St. Charles sees warm summers peaking at 87°F (31°C) in July, and cold winters that bottom out around 26°F (-3°C) in January. Humidity pushes the summer feels-like temperature to around 103°F (39°C). Precipitation occurs on roughly 64 days per year (40.1 in / 1020 mm total), with snow on 6 days and 30 in (758 mm) of annual accumulation. The city averages 131 sunny days per year and around 37 thunderstorm days. Ocean water temperatures reach 86°F (30°C) in summer.
| Temperature | 87°F (31°C) high | 26°F (-3°C) low |
| Feels like | 103°F (40°C) high | 20°F (-6°C) low |
| Rain | 64 days | 40.1 in (1020 mm) /yr |
| Snow | 6 days | 29.9 in (758 mm) /yr |
| Sky | 131 sunny | 37 stormy |
| Wind | 2.2 mph (1.0 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, Apr, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
37
Jan 52
Feb 48
Mar 66
Apr 72
May 58
Jun 62
Jul 53
Aug 59
Sep 46
Oct 45
Nov 55
Dec Humidity (%)
61
Jan 61
Feb 53
Mar 60
Apr 70
May 74
Jun 78
Jul 74
Aug 78
Sep 69
Oct 62
Nov 65
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 18 mi Ronald Reagan Washington National Airport (DCA)
Ski resort 67 mi Snow Riders
National park 10 mi Fort Hunt Park
Mountain peak
(4,928 ft) 282 mi Third Peak
Hospital 6 mi University of Maryland Charles Regional Medical Center
Hiking trail 6 mi White Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 39°F 4°C | 26°F -3°C | 0.9 in 23 mm | 12.4 in315 mm | 17 |
| February | 47°F 8°C | 33°F 1°C | 3.4 in 86 mm | 12.2 in310 mm | 11 |
| March | 62°F 17°C | 44°F 7°C | 2.4 in 60 mm | — | 14 |
| April | 69°F 21°C | 53°F 12°C | 3.4 in 86 mm | — | 6 |
| May | 74°F 24°C | 61°F 16°C | 6.9 in 175 mm | — | 3 |
| June | 85°F 29°C | 71°F 21°C | 4.9 in 124 mm | — | 11 |
| July | 87°F 31°C | 76°F 24°C | 9.3 in 237 mm | — | 9 |
| August | 81°F 27°C | 68°F 20°C | 0.7 in 18 mm | — | 13 |
| September | 78°F 26°C | 64°F 18°C | 4.0 in 100 mm | — | 9 |
| October | 67°F 20°C | 53°F 12°C | 1.7 in 44 mm | — | 14 |
| November | 58°F 14°C | 43°F 6°C | 1.3 in 32 mm | — | 14 |
| December | 45°F 7°C | 32°F 0°C | 1.4 in 34 mm | 5.3 in133 mm | 10 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 17 | 0 |
| February | 11 | 1 |
| March | 14 | 0 |
| April | 6 | 1 |
| May | 3 | 8 |
| June | 11 | 10 |
| July | 9 | 12 |
| August | 13 | 0 |
| September | 9 | 4 |
| October | 14 | 1 |
| November | 14 | 0 |
| December | 10 | 0 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 43°F 6°C | 33°F 1°C |
| February | 40°F 4°C | 34°F 1°C |
| March | 54°F 12°C | 44°F 7°C |
| April | 62°F 17°C | 56°F 13°C |
| May | 71°F 22°C | 65°F 19°C |
| June | 83°F 29°C | 77°F 25°C |
| July | 86°F 30°C | 84°F 29°C |
| August | 84°F 29°C | 76°F 25°C |
| September | 76°F 25°C | 69°F 21°C |
| October | 73°F 23°C | 61°F 16°C |
| November | 58°F 14°C | 49°F 9°C |
| December | 46°F 8°C | 36°F 2°C |