Manassas Climate by Month
Manassas, Virginia, United States
Hot summers and cold winters, with rain spread through the year.
The climate in Manassas is one of hot summers and cold winters, with rain spread through the year. Afternoon highs range from 45°F (7°C) in January to 89°F (32°C) in July, and January nights average 26°F (-3°C). It gets 40 in (1019 mm) of rain a year, spread across the months.
- Warmest month
- 89°F(32°C)
- Average high, July
- Coldest nights
- 26°F(-3°C)
- Average low, January
- Rain per year
- 40 in(1019 mm)
- No clear rainy season
- Humidity
- 64%
- Sunniest: June
Best and worst months in Manassas
Best for weatherMay and October are the best time for weather in Manassas: highs near 74°F (23°C) and about 3.5 in (88 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 45°F (7°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Manassas weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 45°F(7°C) | 26°F(-3°C) | 2.6 in(67 mm) | 57% | 2.0 |
| FebFebruary | 48°F(9°C) | 28°F(-2°C) | 2.4 in(62 mm) | 65% | 2.9 |
| MarMarch | 57°F(14°C) | 35°F(2°C) | 3.3 in(83 mm) | 57% | 3.8 |
| AprApril | 69°F(21°C) | 44°F(7°C) | 3.2 in(82 mm) | 58% | 4.8 |
| MayMayBest | 77°F(25°C) | 54°F(12°C) | 3.7 in(94 mm) | 65% | 5.4 |
| JunJune | 85°F(30°C) | 63°F(17°C) | 3.9 in(100 mm) | 66% | 5.7 |
| JulJuly | 89°F(32°C) | 67°F(20°C) | 3.6 in(91 mm) | 67% | 5.6 |
| AugAugust | 87°F(31°C) | 65°F(19°C) | 3.9 in(98 mm) | 68% | 5.1 |
| SepSeptember | 81°F(27°C) | 58°F(15°C) | 4.1 in(105 mm) | 68% | 4.2 |
| OctOctoberBest | 70°F(21°C) | 46°F(8°C) | 3.2 in(82 mm) | 66% | 3.1 |
| NovNovember | 58°F(15°C) | 37°F(3°C) | 2.9 in(73 mm) | 63% | 2.2 |
| DecDecember | 48°F(9°C) | 29°F(-1°C) | 3.2 in(82 mm) | 62% | 1.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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