Delaware Climate by Month
Delaware, Ohio, United States
Warm summers and freezing winters, with rain spread through the year.
Delaware has warm summers and freezing winters, with rain spread through the year. July is the warmest month, with highs around 85°F (29°C); January is the coolest at 35°F (2°C), and nights dip to 19°F (-7°C). It gets 38 in (955 mm) of rain a year, spread across the months.
- Warmest month
- 85°F(29°C)
- Average high, July
- Coldest nights
- 19°F(-7°C)
- Average low, January
- Rain per year
- 38 in(955 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: July
Best and worst months in Delaware
Best for weatherThe most comfortable weather comes in May and September, with highs around 75°F (24°C) and about 3.6 in (92 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 35°F (2°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 September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Delaware weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 35°F(2°C) | 19°F(-7°C) | 2.5 in(64 mm) | 80% | 1.5 |
| FebFebruary | 38°F(4°C) | 21°F(-6°C) | 2.0 in(52 mm) | 72% | 2.4 |
| MarMarch | 50°F(10°C) | 30°F(-1°C) | 2.8 in(70 mm) | 72% | 3.4 |
| AprApril | 62°F(17°C) | 39°F(4°C) | 3.8 in(96 mm) | 63% | 4.4 |
| MayMayBest | 73°F(23°C) | 50°F(10°C) | 4.1 in(105 mm) | 71% | 5.2 |
| JunJune | 81°F(27°C) | 59°F(15°C) | 4.3 in(110 mm) | 72% | 5.7 |
| JulJuly | 85°F(29°C) | 62°F(17°C) | 3.6 in(92 mm) | 71% | 5.9 |
| AugAugust | 83°F(29°C) | 61°F(16°C) | 3.1 in(79 mm) | 75% | 5.2 |
| SepSeptemberBest | 78°F(25°C) | 54°F(12°C) | 3.1 in(79 mm) | 70% | 4.3 |
| OctOctober | 66°F(19°C) | 43°F(6°C) | 2.6 in(66 mm) | 70% | 2.9 |
| NovNovember | 52°F(11°C) | 33°F(1°C) | 2.8 in(71 mm) | 76% | 1.8 |
| DecDecember | 40°F(4°C) | 25°F(-4°C) | 2.8 in(71 mm) | 80% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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