for Rochester, MN
(1971-00)
Mean number of days with:
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | |
| Cloud Cover from Sunrise to Sunset: | |||||||||||||
| Clear | 7.4 | 7.3 | 6.3 | 6.1 | 6.8 | 6.7 | 8.4 | 8.7 | 9.1 | 8.5 | 5.0 | 6.0 | 86.3 |
| Partly Cloudy | 7.1 | 6.2 | 7.1 | 7.4 | 8.8 | 10.7 | 11.9 | 11.1 | 7.3 | 7.8 | 5.6 | 6.3 | 97.3 |
| Cloudy | 16.5 | 14.8 | 17.6 | 16.4 | 15.4 | 12.7 | 10.7 | 11.2 | 13.6 | 14.7 | 19.4 | 18.7 | 181.7 |
| Precipitation .01 inches or more | |||||||||||||
| 9.6 | 7.8 | 10.7 | 11.7 | 11.6 | 11.4 | 10.7 | 10.1 | 9.8 | 8.6 | 9.6 | 9.3 | 120.9 | |
| Snow 1 inch or more | |||||||||||||
| 3.1 | 2.5 | 3.0 | 1.1 | 0 | 0 | 0 | 0 | 0 | 0.2 | 2.4 | 3.3 | 15.6 | |
| Thunderstorms | |||||||||||||
| 0.1 | 0.2 | 1.3 | 3.3 | 5.7 | 7.4 | 7.7 | 6.3 | 4.7 | 2.0 | 0.6 | 0.1 | 39.4 | |
| Temperature Maximum | |||||||||||||
| 90 or above | 0 | 0 | 0 | 0.1 | 0.3 | 1.7 | 3.1 | 1.5 | 0.4 | * | 0 | 0 | 7.1 |
| 32 or below | 24.9 | 18.1 | 8.5 | 0.7 | 0 | 0 | 0 | 0 | 0 | 0.2 | 8.7 | 22.2 | 83.3 |
| Temperature Minimum | |||||||||||||
| 32 or below | 30.8 | 27.1 | 25.4 | 12.2 | 1.5 | 0 | 0 | 0 | 1.1 | 10.4 | 24.3 | 30.4 | 163.2 |
| 0 or below | 13.2 | 7.8 | 2.3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.2 | 8.5 | 33.0 |
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| Degree Days (base 65 F) | |||||||||||||
| Heating | 1650 | 1305 | 1066 | 609 | 281 | 65 | 23 | 50 | 208 | 558 | 1014 | 1479 | 8308 |
| Cooling | 0 | 0 | 0 | 1 | 30 | 99 | 181 | 135 | 26 | 1 | 0 | 0 | 473 |
| Wind in m.p.h. | |||||||||||||
| Mean speed | 13.0 | 12.6 | 13.2 | 13.7 | 12.4 | 11.4 | 10.1 | 9.8 | 10.9 | 12.0 | 13.1 | 12.8 | 12.1 |
| Mean direction | NW | NW | NW | NW | S | S | S | S | S | S | NW | NW | S |
