Troy, Illinois Climate
United States
Pop. 10,036 Elev. 170 m / 558 ft
TZ: America/Chicago (UTC-5) ·
Summers in Troy are warm, with July highs around 89°F (32°C), while winters are frigid with January lows of 20°F (-7°C). Humidity pushes the summer feels-like temperature to around 107°F (42°C). Expect around 69 rainy days annually (41.6 in / 1057 mm total), with snow on 5 days and 28 in (719 mm) of annual accumulation. The city averages 125 sunny days per year and around 52 thunderstorm days. Nearby lake water reaches 83°F (28°C) in summer.
| Temperature | 89°F (32°C) high | 20°F (-7°C) low |
| Feels like | 107°F (42°C) high | 15°F (-10°C) low |
| Rain | 69 days | 41.6 in (1057 mm) /yr |
| Snow | 5 days | 28.3 in (719 mm) /yr |
| Sky | 125 sunny | 52 stormy |
| Wind | 2.1 mph (0.9 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
49
Jan 60
Feb 51
Mar 66
Apr 62
May 56
Jun 60
Jul 47
Aug 42
Sep 44
Oct 52
Nov 60
Dec Humidity (%)
65
Jan 65
Feb 51
Mar 61
Apr 64
May 71
Jun 76
Jul 69
Aug 63
Sep 66
Oct 68
Nov 71
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 13 mi Scott AFB/Midamerica Airport (BLV)
Ski resort 44 mi Hidden Valley
National park 79 mi Emmett Till and Mamie Till-Mobley National Monument
Hospital 3 mi Anderson Hospital
Hiking trail 23 mi
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 36°F 2°C | 20°F -7°C | 0.7 in 19 mm | 13.1 in332 mm | 13 |
| February | 43°F 6°C | 27°F -3°C | 0.9 in 24 mm | 8.1 in205 mm | 9 |
| March | 65°F 19°C | 42°F 6°C | 3.2 in 81 mm | 0.4 in10 mm | 15 |
| April | 70°F 21°C | 50°F 10°C | 6.6 in 168 mm | 0.0 in1 mm | 5 |
| May | 75°F 24°C | 57°F 14°C | 5.2 in 131 mm | — | 9 |
| June | 85°F 30°C | 70°F 21°C | 7.4 in 188 mm | — | 10 |
| July | 89°F 32°C | 74°F 23°C | 6.0 in 151 mm | — | 6 |
| August | 85°F 30°C | 66°F 19°C | 1.1 in 27 mm | — | 14 |
| September | 84°F 29°C | 59°F 15°C | 4.3 in 109 mm | — | 13 |
| October | 72°F 22°C | 53°F 11°C | 3.0 in 77 mm | — | 15 |
| November | 57°F 14°C | 40°F 4°C | 2.6 in 65 mm | 4.7 in119 mm | 10 |
| December | 45°F 7°C | 29°F -2°C | 0.7 in 18 mm | 2.1 in53 mm | 6 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 0 |
| February | 9 | 1 |
| March | 15 | 4 |
| April | 5 | 9 |
| May | 9 | 5 |
| June | 10 | 11 |
| July | 6 | 11 |
| August | 14 | 2 |
| September | 13 | 4 |
| October | 15 | 2 |
| November | 10 | 3 |
| December | 6 | 0 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 33°F 0°C |
| February | 32°F 0°C |
| March | 49°F 9°C |
| April | 58°F 15°C |
| May | 65°F 18°C |
| June | 77°F 25°C |
| July | 83°F 28°C |
| August | 77°F 25°C |
| September | 72°F 22°C |
| October | 62°F 17°C |
| November | 46°F 8°C |
| December | 34°F 1°C |