WMO Normals
Rockford, Il Climate & Temperature
- Rockford, Il, Usa is at 42°12'N, 89°5'W, 226 m (741 ft). See map.
- Rockford, Il has a humid continental climate with severe winters, no dry season, hot summers and strong seasonality (Köppen-Geiger classification: Dfa).
- According to the Holdridge life zones system of bioclimatic classification Rockford, Il is situated in or near the cool temperate moist forest biome.
- The mean temperature is 8.7 degrees Celsius (47.7 degrees Fahrenheit). See the temperatures page for a monthly breakdown and the fixed scale graph.
- Average monthly temperatures vary by 30.6 °C (55.1°F). This indicates that the continentality type is continental, subtype truly continental.
- In the winter time records indicate temperatures by day reach -1.1°C (30°F) on average falling to -10.3°C (13.4°F) overnight.
- In spring time temperatures climb reaching 14.3°C (57.7°F) generally in the afternoon with overnight lows of 2.7°C (36.8°F).
- During summer average high temperatures are 27.7°C (81.8°F) and average low temperatures are 15.6°C (60°F).
- Come autumn/ fall temperatures decrease achieving average highs of 16°C (60.9°F) during the day and lows of 4.8°C (40.7°F) generally shortly after sunrise.
- Total annual Precipitation averages 921.6 mm (36.3 inches) which is equivalent to 921.6 Litres/m² (22.6 Gallons/ft²).
- Were you to burrow down through the centre of the Earth from Rockford, Il you would pop up nearest to the climate station at Amsterdam Island, French Southern Lands where you would find a Marine west coast climate.
Rockford, Il Climate Table
| Climate Variable | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average Max Temperature °C ( °F) | -3 (27) | 0 (32) | 7 (44) | 15 (58) | 22 (71) | 27 (80) | 29 (84) | 27 (81) | 23 (74) | 17 (62) | 8 (46) | 0 (32) | 14 (58) | ||
| Average Temperature °C ( °F) | -8 (18) | -5 (23) | 2 (35) | 9 (48) | 15 (59) | 20 (69) | 23 (73) | 22 (71) | 17 (63) | 11 (51) | 3 (38) | -4 (24) | 9 (48) | ||
| Average Min Temperature °C ( °F) | -12 (10) | -10 (14) | -3 (26) | 3 (37) | 9 (47) | 14 (57) | 17 (62) | 16 (60) | 11 (52) | 5 (41) | -1 (29) | -9 (16) | 3 (38) | ||
| Average Precipitation mm (in) | 33 (1) | 29 (1) | 63 (2) | 93 (4) | 93 (4) | 115 (5) | 105 (4) | 105 (4) | 97 (4) | 73 (3) | 65 (3) | 52 (2) | 922 (36) | ||
| Average Daylight Hours/ Day | 9h 28' | 10h 30' | 11h 52' | 13h 19' | 14h 33' | 15h 12' | 14h 55' | 13h 50' | 12h 26' | 10h 58' | 9h 45' | 9h 08' | 12h 00' | ||
| Sun altitude at solar noon on the 21st day (°). | 28 | 37.3 | 48.2 | 59.8 | 68.1 | 71.2 | 68.1 | 59.8 | 48.3 | 36.8 | 27.7 | 24.4 | 48.1 |
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