Humid subtropical climate
Climate Cairo - Illinois
Annual high68ºF
Annual low47ºF
Precipitation48.64 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 43 | 25 | 3.69 | 2 |
| Feb | 48 | 29 | 3.77 | 2 |
| Mar | 58 | 37 | 4.05 | 0 |
| Apr | 70 | 46 | 4.63 | 0 |
| May | 78 | 57 | 5.27 | 0 |
| Jun | 86 | 65 | 3.91 | 0 |
| Jul | 89 | 69 | 4.14 | 0 |
| Aug | 88 | 67 | 3.01 | 0 |
| Sep | 81 | 59 | 3.19 | 0 |
| Oct | 70 | 47 | 4.05 | 0 |
| Nov | 58 | 38 | 4.46 | 0 |
| Dec | 46 | 29 | 4.47 | 1 |
- JanHigh 43ºFLow 25ºFPrecip 3.69 inch
- FebHigh 48ºFLow 29ºFPrecip 3.77 inch
- MarHigh 58ºFLow 37ºFPrecip 4.05 inch
- AprHigh 70ºFLow 46ºFPrecip 4.63 inch
- MayHigh 78ºFLow 57ºFPrecip 5.27 inch
- JunHigh 86ºFLow 65ºFPrecip 3.91 inch
- JulHigh 89ºFLow 69ºFPrecip 4.14 inch
- AugHigh 88ºFLow 67ºFPrecip 3.01 inch
- SepHigh 81ºFLow 59ºFPrecip 3.19 inch
- OctHigh 70ºFLow 47ºFPrecip 4.05 inch
- NovHigh 58ºFLow 38ºFPrecip 4.46 inch
- DecHigh 46ºFLow 29ºFPrecip 4.47 inch
Climate summary
What is the average weather in Cairo, Illinois?
Cairo experiences a humid subtropical climate with a very large seasonal temperature contrast. Summers are hot, and while rainfall is fairly evenly spread, heavy seasonal downpours can occur during warmer months. Winters are cold and bring occasional snowfall, contributing to the area's fairly wet annual precipitation.
Cairo weather averages
Annual high68ºF
Annual low47ºF
Precipitation48.64 inch
Snowfall5 inch
Daily normals Cairo - Illinois - January
| Day | HighºF | LowºF | Prec/ | Prec/ |
|---|---|---|---|---|
| Jan 1 | 43.6 | 27.1 | 0.14 | 0.14 |
| Jan 2 | 43.5 | 26.9 | 0.28 | 0.28 |
| Jan 3 | 43.4 | 26.8 | 0.42 | 0.42 |
| Jan 4 | 43.3 | 26.7 | 0.56 | 0.56 |
| Jan 5 | 43.3 | 26.5 | 0.71 | 0.71 |
| Jan 6 | 43.2 | 26.4 | 0.85 | 0.85 |
| Jan 7 | 43.1 | 26.3 | 1.00 | 1.00 |
| Jan 8 | 43.1 | 26.2 | 1.14 | 1.14 |
| Jan 9 | 43.1 | 26.1 | 1.28 | 1.28 |
| Jan 10 | 43.0 | 26.0 | 1.42 | 1.42 |
| Jan 11 | 43.0 | 25.9 | 1.56 | 1.56 |
| Jan 12 | 43.0 | 25.8 | 1.69 | 1.69 |
| Jan 13 | 43.0 | 25.7 | 1.83 | 1.83 |
| Jan 14 | 43.0 | 25.7 | 1.96 | 1.96 |
| Jan 15 | 43.0 | 25.6 | 2.09 | 2.09 |
| Jan 16 | 43.0 | 25.6 | 2.21 | 2.21 |
| Jan 17 | 43.1 | 25.6 | 2.33 | 2.33 |
| Jan 18 | 43.1 | 25.5 | 2.44 | 2.44 |
| Jan 19 | 43.2 | 25.5 | 2.54 | 2.54 |
| Jan 20 | 43.2 | 25.5 | 2.64 | 2.64 |
| Jan 21 | 43.3 | 25.6 | 2.74 | 2.74 |
| Jan 22 | 43.4 | 25.6 | 2.84 | 2.84 |
| Jan 23 | 43.5 | 25.6 | 2.95 | 2.95 |
| Jan 24 | 43.6 | 25.7 | 3.06 | 3.06 |
| Jan 25 | 43.7 | 25.7 | 3.17 | 3.17 |
| Jan 26 | 43.8 | 25.8 | 3.27 | 3.27 |
| Jan 27 | 43.9 | 25.9 | 3.38 | 3.38 |
| Jan 28 | 44.1 | 26.0 | 3.48 | 3.48 |
| Jan 29 | 44.2 | 26.1 | 3.58 | 3.58 |
| Jan 30 | 44.4 | 26.3 | 3.69 | 3.69 |
| Jan 31 | 44.5 | 26.4 | 3.80 | 3.80 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Cairo - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 91.4 | 71.4 | – |
| Oct 2 | 82.6 | 65.8 | 1.61 |
| Oct 3 | 75.7 | 59.9 | – |
| Oct 4 | 80.1 | 59.9 | – |
| Oct 5 | 79.5 | 55.0 | – |
| Oct 6 | 80.4 | 48.7 | – |
| Oct 7 | 85.5 | 47.5 | – |
| Oct 8 | 86.9 | 55.0 | – |
| Oct 9 | 88.2 | 51.1 | – |
| Oct 10 | 71.4 | 55.9 | – |
| Oct 11 | 84.4 | 56.3 | – |
| Oct 12 | 90.3 | 56.5 | – |
| Oct 13 | 91.4 | 58.3 | – |
| Oct 14 | 83.7 | 72.0 | 0.02 |
| Oct 15 | 92.5 | 73.4 | – |
| Oct 16 | 79.7 | 53.6 | 0.12 |
| Oct 17 | 61.3 | 46.0 | – |
| Oct 18 | 68.4 | 38.1 | – |
| Oct 19 | 72.1 | 40.5 | – |
| Oct 20 | 74.3 | 43.3 | – |
| Oct 21 | 76.3 | 44.8 | – |
| Oct 22 | 78.3 | 45.0 | – |
| Oct 23 | 76.1 | 46.2 | – |
| Oct 24 | 77.9 | 43.5 | – |
| Oct 25 | 77.5 | 46.2 | – |
| Oct 26 | 74.8 | 47.7 | – |
| Oct 27 | 75.4 | 45.5 | – |
| Oct 28 | – | – | – |
| Oct 29 | – | – | – |
| Oct 30 | – | – | – |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature92.5ºF · Oct 15
- Lowest max temperature61.3ºF · Oct 17
- Highest min temperature73.4ºF · Oct 15
- Lowest min temperature38.1ºF · Oct 18
Geo Cairo - Illinois
Location
- Country
- United States
- State
- Illinois
- County
- Alexander
- City
- Cairo
- Zip Code
- 62914
- Elevation
- 318 ft
- Longitude
- -89.22
- Latitude
- 37.06
- ICAO
- –
- IATA
- –