Olney, Maryland Climate
United States
Pop. 33,844 Elev. 162 m / 532 ft
TZ: America/New_York (UTC-4) ·
Olney has warm summers with average highs of 88°F (31°C) in July, and cold winters averaging 24°F (-4°C) in January. Humidity pushes the summer feels-like temperature to 102°F (39°C), while wind chill can drive winter lows to 17°F (-8°C). Rain falls on about 67 days per year (41.2 in / 1045 mm total), with snow on 4 days and 23 in (591 mm) of annual accumulation. The city averages 121 sunny days per year and around 46 thunderstorm days. Ocean water temperatures reach 86°F (30°C) in summer.
| Temperature | 88°F (31°C) high | 24°F (-4°C) low |
| Feels like | 102°F (39°C) high | 17°F (-8°C) low |
| Rain | 67 days | 41.2 in (1045 mm) /yr |
| Snow | 4 days | 23.3 in (591 mm) /yr |
| Sky | 121 sunny | 46 stormy |
| Wind | 2.6 mph (1.1 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 (%)
41
Jan 56
Feb 46
Mar 68
Apr 75
May 61
Jun 62
Jul 51
Aug 60
Sep 46
Oct 50
Nov 61
Dec Humidity (%)
56
Jan 56
Feb 49
Mar 56
Apr 68
May 71
Jun 76
Jul 72
Aug 73
Sep 64
Oct 58
Nov 62
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 21 mi Ronald Reagan Washington National Airport (DCA)
Ski resort 45 mi Liberty Mountain Resort
National park 13 mi Rock Creek Park
Mountain peak
(4,928 ft) 295 mi Third Peak
Hospital 1 mi Medstar Montgomery Medical Center
Hiking trail 3 mi Underground Railroad Experience Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 37°F 3°C | 24°F -4°C | 0.7 in 17 mm | 12.0 in305 mm | 16 |
| February | 45°F 7°C | 30°F -1°C | 2.6 in 65 mm | 6.0 in152 mm | 10 |
| March | 61°F 16°C | 41°F 5°C | 2.0 in 52 mm | — | 13 |
| April | 68°F 20°C | 50°F 10°C | 3.1 in 78 mm | — | 5 |
| May | 73°F 23°C | 58°F 14°C | 8.0 in 202 mm | — | 3 |
| June | 84°F 29°C | 67°F 19°C | 5.2 in 131 mm | — | 10 |
| July | 88°F 31°C | 72°F 22°C | 9.8 in 250 mm | — | 8 |
| August | 80°F 27°C | 64°F 18°C | 1.1 in 29 mm | — | 13 |
| September | 78°F 26°C | 61°F 16°C | 2.8 in 71 mm | — | 10 |
| October | 67°F 19°C | 49°F 9°C | 2.5 in 64 mm | — | 14 |
| November | 56°F 13°C | 40°F 4°C | 1.6 in 42 mm | 0.2 in4 mm | 13 |
| December | 42°F 5°C | 28°F -2°C | 1.7 in 43 mm | 5.1 in129 mm | 6 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 16 | 0 |
| February | 10 | 1 |
| March | 13 | 1 |
| April | 5 | 2 |
| May | 3 | 11 |
| June | 10 | 11 |
| July | 8 | 13 |
| August | 13 | 2 |
| September | 10 | 3 |
| October | 14 | 1 |
| November | 13 | 0 |
| December | 6 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 43°F 6°C | 33°F 0°C |
| February | 40°F 4°C | 32°F 0°C |
| March | 54°F 12°C | 42°F 6°C |
| April | 62°F 17°C | 53°F 12°C |
| May | 71°F 22°C | 64°F 18°C |
| June | 83°F 29°C | 76°F 24°C |
| July | 86°F 30°C | 83°F 28°C |
| August | 84°F 29°C | 75°F 24°C |
| September | 76°F 25°C | 69°F 21°C |
| October | 73°F 23°C | 58°F 15°C |
| November | 58°F 14°C | 46°F 8°C |
| December | 46°F 8°C | 35°F 2°C |