Common information
- Country
- United States
- Population
- 141 853
Weather, climate, temperature by months in Naperville
| Season | Autumn | Winter | Spring | Summer | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Sep | Oct | Nov | Dec | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Year |
| Record high, °C | 39 | 32 | 26 | 21 | 18 | 23 | 29 | 33 | 35 | 39 | 41 | 38 | 41 |
| Average high, °C | 24 | 17 | 9 | 1 | -1 | 2 | 8 | 16 | 21 | 27 | 28 | 27 | 15 |
| Average temperature, °C | 17 | 11 | 4 | -3 | -5 | -3 | 3 | 9 | 15 | 20 | 22 | 21 | 9 |
| Average low, °C | 11 | 5 | -1 | -7 | -10 | -8 | -3 | 3 | 8 | 13 | 16 | 16 | 4 |
| Record low, °C | -3 | -10 | -20 | -29 | -32 | -29 | -24 | -16 | -4 | 0 | 5 | 3 | -32 |
| Rain, days | 8 | 8 | 9 | 9 | 9 | 8 | 10 | 10 | 11 | 10 | 9 | 8 | 107 |
| Snow, days | 0 | 0 | 1 | 4 | 6 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 17 |
| Snowfall, cm. | 0 | 0 | 2 | 14 | 24 | 20 | 9 | 2 | 0 | 0 | 0 | 0 | 71 |
| Average precipitation, mm. | 86 | 79 | 84 | 61 | 48 | 48 | 64 | 91 | 104 | 107 | 104 | 109 | 986 |
| Relative humidity, % | 73 | 72 | 74 | 77 | 77 | 74 | 71 | 68 | 69 | 70 | 73 | 75 | 73 |
| Wind speed, km/h | 13 | 15 | 17 | 17 | 18 | 18 | 18 | 19 | 16 | 14 | 13 | 12 | 16 |
| Day Length, часов | 13 | 12 | 10 | 10 | 10 | 11 | 13 | 14 | 15 | 16 | 15 | 14 | 13 |
| Growing degree-day, °C | 399 | 138 | 24 | 2 | 0 | 1 | 20 | 94 | 279 | 540 | 690 | 638 | 2825 |
| Solar radiation, global, Mj/m2 | 15 | 11 | 7 | 6 | 6 | 9 | 13 | 17 | 20 | 22 | 22 | 19 | 14 |