Hot-summer humid continental climate
Climate Jerseyville - Illinois
Annual high64ºF
Annual low43ºF
Precipitation40.6 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 37 | 19 | 2.17 | 4 |
| Feb | 42 | 23 | 2.25 | 3 |
| Mar | 53 | 32 | 3.24 | 2 |
| Apr | 65 | 42 | 3.88 | 0 |
| May | 75 | 53 | 4.61 | 0 |
| Jun | 83 | 62 | 3.84 | 0 |
| Jul | 87 | 66 | 3.62 | 0 |
| Aug | 86 | 63 | 3.17 | 0 |
| Sep | 79 | 54 | 3.41 | 0 |
| Oct | 67 | 43 | 3.21 | 0 |
| Nov | 54 | 34 | 4.08 | 1 |
| Dec | 40 | 22 | 3.12 | 4 |
- JanHigh 37ºFLow 19ºFPrecip 2.17 inch
- FebHigh 42ºFLow 23ºFPrecip 2.25 inch
- MarHigh 53ºFLow 32ºFPrecip 3.24 inch
- AprHigh 65ºFLow 42ºFPrecip 3.88 inch
- MayHigh 75ºFLow 53ºFPrecip 4.61 inch
- JunHigh 83ºFLow 62ºFPrecip 3.84 inch
- JulHigh 87ºFLow 66ºFPrecip 3.62 inch
- AugHigh 86ºFLow 63ºFPrecip 3.17 inch
- SepHigh 79ºFLow 54ºFPrecip 3.41 inch
- OctHigh 67ºFLow 43ºFPrecip 3.21 inch
- NovHigh 54ºFLow 34ºFPrecip 4.08 inch
- DecHigh 40ºFLow 22ºFPrecip 3.12 inch
Climate summary
What is the average weather in Jerseyville, Illinois?
Jerseyville experiences a humid continental climate, marked by a very large seasonal temperature contrast. Summers are hot, while winters are cold and bring regular snowfall. The area is fairly wet, with precipitation spread relatively evenly throughout the year, though spring tends to be wetter and winter is the driest season.
Jerseyville weather averages
Annual high64ºF
Annual low43ºF
Precipitation40.6 inch
Snowfall14 inch
Daily normals Jerseyville - Illinois - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 37.0 | 20.7 | 0.10 | 0.10 | 0.10 | 0.10 |
| Jan 2 | 36.8 | 20.5 | 0.19 | 0.19 | 0.20 | 0.20 |
| Jan 3 | 36.7 | 20.3 | 0.28 | 0.28 | 0.40 | 0.40 |
| Jan 4 | 36.5 | 20.2 | 0.38 | 0.38 | 0.50 | 0.50 |
| Jan 5 | 36.4 | 20.0 | 0.47 | 0.47 | 0.60 | 0.60 |
| Jan 6 | 36.3 | 19.8 | 0.56 | 0.56 | 0.70 | 0.70 |
| Jan 7 | 36.2 | 19.7 | 0.65 | 0.65 | 0.90 | 0.90 |
| Jan 8 | 36.1 | 19.6 | 0.74 | 0.74 | 1.00 | 1.00 |
| Jan 9 | 36.0 | 19.4 | 0.83 | 0.83 | 1.20 | 1.20 |
| Jan 10 | 35.9 | 19.3 | 0.92 | 0.92 | 1.30 | 1.30 |
| Jan 11 | 35.9 | 19.2 | 1.00 | 1.00 | 1.40 | 1.40 |
| Jan 12 | 35.8 | 19.1 | 1.08 | 1.08 | 1.60 | 1.60 |
| Jan 13 | 35.8 | 19.0 | 1.15 | 1.15 | 1.70 | 1.70 |
| Jan 14 | 35.8 | 18.9 | 1.23 | 1.23 | 1.90 | 1.90 |
| Jan 15 | 35.8 | 18.8 | 1.31 | 1.31 | 2.10 | 2.10 |
| Jan 16 | 35.8 | 18.8 | 1.38 | 1.38 | 2.20 | 2.20 |
| Jan 17 | 35.8 | 18.7 | 1.46 | 1.46 | 2.40 | 2.40 |
| Jan 18 | 35.8 | 18.7 | 1.54 | 1.54 | 2.50 | 2.50 |
| Jan 19 | 35.9 | 18.6 | 1.62 | 1.62 | 2.60 | 2.60 |
| Jan 20 | 35.9 | 18.6 | 1.69 | 1.69 | 2.80 | 2.80 |
| Jan 21 | 36.0 | 18.6 | 1.76 | 1.76 | 2.90 | 2.90 |
| Jan 22 | 36.1 | 18.6 | 1.84 | 1.84 | 3.10 | 3.10 |
| Jan 23 | 36.2 | 18.6 | 1.91 | 1.91 | 3.20 | 3.20 |
| Jan 24 | 36.3 | 18.7 | 1.98 | 1.98 | 3.30 | 3.30 |
| Jan 25 | 36.5 | 18.7 | 2.06 | 2.06 | 3.50 | 3.50 |
| Jan 26 | 36.6 | 18.8 | 2.12 | 2.12 | 3.60 | 3.60 |
| Jan 27 | 36.7 | 18.9 | 2.19 | 2.19 | 3.80 | 3.80 |
| Jan 28 | 36.9 | 19.0 | 2.26 | 2.26 | 3.90 | 3.90 |
| Jan 29 | 37.1 | 19.1 | 2.32 | 2.32 | 4.00 | 4.00 |
| Jan 30 | 37.3 | 19.2 | 2.38 | 2.38 | 4.20 | 4.20 |
| Jan 31 | 37.5 | 19.3 | 2.45 | 2.45 | 4.30 | 4.30 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Jerseyville - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 91.0 | 69.1 | 0.00 |
| Oct 2 | 90.0 | 62.1 | 0.50 |
| Oct 3 | – | – | – |
| Oct 4 | – | – | – |
| Oct 5 | – | – | – |
| Oct 6 | – | – | – |
| Oct 7 | – | – | – |
| Oct 8 | 89.1 | 46.9 | 0.00 |
| Oct 9 | 86.0 | 46.9 | 0.00 |
| Oct 10 | 89.1 | 46.9 | – |
| Oct 11 | 81.0 | 48.0 | – |
| Oct 12 | 87.1 | 64.0 | 0.00 |
| Oct 13 | 91.9 | 64.0 | 0.00 |
| Oct 14 | – | – | – |
| Oct 15 | – | – | – |
| Oct 16 | – | – | – |
| Oct 17 | – | – | – |
| Oct 18 | – | – | – |
| Oct 19 | – | – | – |
| Oct 20 | – | – | – |
| Oct 21 | – | – | – |
| Oct 22 | 77.0 | 43.0 | 0.00 |
| Oct 23 | 77.0 | 44.1 | 0.00 |
| Oct 24 | 75.9 | 46.0 | – |
| Oct 25 | 75.9 | 48.0 | – |
| Oct 26 | 80.1 | 46.9 | 0.00 |
| Oct 27 | 79.0 | 44.1 | 0.00 |
| Oct 28 | 71.1 | 50.0 | 0.00 |
| Oct 29 | 79.0 | 50.0 | 0.00 |
| 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 temperature91.9ºF · Oct 13
- Lowest max temperature71.1ºF · Oct 28
- Highest min temperature69.1ºF · Oct 1
- Lowest min temperature43.0ºF · Oct 22
Geo Jerseyville - Illinois
Location
- Country
- United States
- State
- Illinois
- County
- Jersey
- City
- Jerseyville
- Zip Code
- 62052
- Elevation
- 650 ft
- Longitude
- -90.33
- Latitude
- 39.12
- ICAO
- –
- IATA
- –