Savanna, Illinois Climate
United States
Pop. 2,880 Elev. 184 m / 604 ft
TZ: America/Chicago (UTC-5) ·
Dry and warm, Savanna sees July highs of 85°F (29°C) and cold January lows of 14°F (-10°C). Humidity pushes the summer feels-like temperature to 95°F (35°C), while wind chill can drive winter lows to 5°F (-15°C). Expect around 37 rainy days annually (28.7 in / 728 mm total), with snow on 4 days and 32 in (803 mm) of annual accumulation. The city averages 118 sunny days per year and around 27 thunderstorm days. Nearby lake water reaches 77°F (25°C) in summer.
| Temperature | 85°F (29°C) high | 14°F (-10°C) low |
| Feels like | 95°F (35°C) high | 5°F (-15°C) low |
| Rain | 37 days | 28.7 in (728 mm) /yr |
| Snow | 4 days | 31.6 in (803 mm) /yr |
| Sky | 118 sunny | 27 stormy |
| Wind | 2.3 mph (1.0 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: May, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
49
Jan 61
Feb 51
Mar 67
Apr 55
May 53
Jun 59
Jul 52
Aug 43
Sep 44
Oct 56
Nov 74
Dec Humidity (%)
61
Jan 65
Feb 60
Mar 61
Apr 59
May 67
Jun 76
Jul 74
Aug 62
Sep 60
Oct 66
Nov 79
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 35 mi Dubuque Regional Airport (DBQ)
Ski resort 20 mi Chestnut Mountain Resort
National park 82 mi Pikes Peak State Park
Hospital 16 mi MercyOne
Hiking trail 2 mi Mississippi Palisades State Park Trails south
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 31°F -1°C | 14°F -10°C | 0.7 in 17 mm | 2.2 in56 mm | 14 |
| February | 33°F 1°C | 17°F -8°C | 0.1 in 2 mm | 6.2 in158 mm | 7 |
| March | 57°F 14°C | 34°F 1°C | 3.4 in 86 mm | 6.4 in162 mm | 11 |
| April | 62°F 17°C | 43°F 6°C | 3.5 in 89 mm | — | 4 |
| May | 72°F 22°C | 51°F 11°C | 2.9 in 74 mm | — | 12 |
| June | 84°F 29°C | 65°F 18°C | 5.1 in 129 mm | — | 10 |
| July | 85°F 29°C | 69°F 21°C | 5.4 in 136 mm | — | 7 |
| August | 81°F 27°C | 63°F 17°C | 3.0 in 76 mm | — | 13 |
| September | 81°F 27°C | 57°F 14°C | 0.9 in 22 mm | — | 13 |
| October | 69°F 21°C | 49°F 10°C | 1.6 in 41 mm | — | 12 |
| November | 50°F 10°C | 34°F 1°C | 1.0 in 25 mm | 9.9 in252 mm | 11 |
| December | 32°F 0°C | 18°F -8°C | 1.2 in 31 mm | 6.9 in176 mm | 4 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 14 | 1 |
| February | 7 | 0 |
| March | 11 | 4 |
| April | 4 | 2 |
| May | 12 | 2 |
| June | 10 | 3 |
| July | 7 | 6 |
| August | 13 | 5 |
| September | 13 | 2 |
| October | 12 | 1 |
| November | 11 | 0 |
| December | 4 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 38°F 3°C |
| April | 49°F 9°C |
| May | 58°F 15°C |
| June | 70°F 21°C |
| July | 77°F 25°C |
| August | 74°F 23°C |
| September | 67°F 19°C |
| October | 59°F 15°C |
| November | 42°F 6°C |
| December | 32°F 0°C |