Frederick Climate by Month
Frederick, Maryland, United States
Hot summers and cold winters, with rain spread through the year.
Frederick has hot summers and cold winters, with rain spread through the year. July is the warmest month, with highs around 88°F (31°C); January is the coolest at 42°F (6°C), and nights dip to 25°F (-4°C). About 38 in (969 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 88°F(31°C)
- Average high, July
- Coldest nights
- 25°F(-4°C)
- Average low, January
- Rain per year
- 38 in(969 mm)
- No clear rainy season
- Humidity
- 63%
- Sunniest: June
Best and worst months in Frederick
Best for weatherThe most comfortable weather comes in May, with highs around 76°F (25°C) and about 3.5 in (88 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 42°F (6°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)
Frederick weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 42°F(6°C) | 25°F(-4°C) | 2.5 in(63 mm) | 62% | 1.8 |
| FebFebruary | 46°F(8°C) | 26°F(-3°C) | 2.4 in(60 mm) | 56% | 2.8 |
| MarMarch | 55°F(13°C) | 33°F(1°C) | 3.4 in(87 mm) | 61% | 3.6 |
| AprApril | 67°F(20°C) | 42°F(6°C) | 3.3 in(85 mm) | 55% | 4.7 |
| MayMayBest | 76°F(25°C) | 52°F(11°C) | 3.5 in(88 mm) | 63% | 5.3 |
| JunJune | 84°F(29°C) | 62°F(16°C) | 3.8 in(96 mm) | 65% | 5.6 |
| JulJuly | 88°F(31°C) | 66°F(19°C) | 3.7 in(94 mm) | 66% | 5.6 |
| AugAugust | 87°F(30°C) | 65°F(18°C) | 3.7 in(95 mm) | 66% | 5.1 |
| SepSeptember | 80°F(27°C) | 57°F(14°C) | 3.7 in(93 mm) | 67% | 4.1 |
| OctOctober | 69°F(20°C) | 45°F(7°C) | 2.6 in(65 mm) | 69% | 3.0 |
| NovNovember | 57°F(14°C) | 36°F(2°C) | 2.6 in(65 mm) | 65% | 2.1 |
| DecDecember | 46°F(8°C) | 29°F(-2°C) | 3.1 in(78 mm) | 66% | 1.7 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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