Hot-summer humid continental climate
Climate Jefferson - Iowa
Annual high59ºF
Annual low37ºF
Precipitation34.1 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 29 | 10 | 0.93 | 7 |
| Feb | 34 | 15 | 1.05 | 7 |
| Mar | 47 | 25 | 2.05 | 5 |
| Apr | 62 | 36 | 3.37 | 1 |
| May | 72 | 49 | 4.54 | 0 |
| Jun | 81 | 59 | 4.99 | 0 |
| Jul | 85 | 63 | 4.61 | 0 |
| Aug | 83 | 61 | 3.95 | 0 |
| Sep | 76 | 51 | 2.98 | 0 |
| Oct | 63 | 39 | 2.44 | 0 |
| Nov | 46 | 27 | 1.88 | 2 |
| Dec | 31 | 14 | 1.31 | 8 |
- JanHigh 29ºFLow 10ºFPrecip 0.93 inch
- FebHigh 34ºFLow 15ºFPrecip 1.05 inch
- MarHigh 47ºFLow 25ºFPrecip 2.05 inch
- AprHigh 62ºFLow 36ºFPrecip 3.37 inch
- MayHigh 72ºFLow 49ºFPrecip 4.54 inch
- JunHigh 81ºFLow 59ºFPrecip 4.99 inch
- JulHigh 85ºFLow 63ºFPrecip 4.61 inch
- AugHigh 83ºFLow 61ºFPrecip 3.95 inch
- SepHigh 76ºFLow 51ºFPrecip 2.98 inch
- OctHigh 63ºFLow 39ºFPrecip 2.44 inch
- NovHigh 46ºFLow 27ºFPrecip 1.88 inch
- DecHigh 31ºFLow 14ºFPrecip 1.31 inch
Climate summary
What is the average weather in Jefferson, Iowa?
Jefferson experiences a humid continental climate, marked by very strong seasonal contrasts. Summers are warm, while winters are cold and snowy, bringing significant snowfall. Precipitation is moderate overall, with a strong pattern of wetter summers and drier winters, though moisture is spread relatively evenly throughout the year.
Jefferson weather averages
Annual high59ºF
Annual low37ºF
Precipitation34.1 inch
Snowfall30 inch
Daily normals Jefferson - Iowa - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 28.4 | 11.4 | 0.03 | 0.03 | 0.20 | 0.20 |
| Jan 2 | 28.2 | 11.2 | 0.06 | 0.06 | 0.50 | 0.50 |
| Jan 3 | 28.1 | 10.9 | 0.08 | 0.08 | 0.70 | 0.70 |
| Jan 4 | 27.9 | 10.7 | 0.11 | 0.11 | 0.90 | 0.90 |
| Jan 5 | 27.8 | 10.5 | 0.14 | 0.14 | 1.20 | 1.20 |
| Jan 6 | 27.7 | 10.2 | 0.17 | 0.17 | 1.40 | 1.40 |
| Jan 7 | 27.6 | 10.0 | 0.20 | 0.20 | 1.60 | 1.60 |
| Jan 8 | 27.5 | 9.8 | 0.23 | 0.23 | 1.90 | 1.90 |
| Jan 9 | 27.4 | 9.6 | 0.25 | 0.25 | 2.10 | 2.10 |
| Jan 10 | 27.3 | 9.4 | 0.28 | 0.28 | 2.40 | 2.40 |
| Jan 11 | 27.3 | 9.3 | 0.31 | 0.31 | 2.60 | 2.60 |
| Jan 12 | 27.2 | 9.1 | 0.34 | 0.34 | 2.90 | 2.90 |
| Jan 13 | 27.2 | 8.9 | 0.37 | 0.37 | 3.10 | 3.10 |
| Jan 14 | 27.2 | 8.8 | 0.40 | 0.40 | 3.40 | 3.40 |
| Jan 15 | 27.2 | 8.7 | 0.43 | 0.43 | 3.70 | 3.70 |
| Jan 16 | 27.2 | 8.5 | 0.46 | 0.46 | 3.90 | 3.90 |
| Jan 17 | 27.2 | 8.4 | 0.49 | 0.49 | 4.20 | 4.20 |
| Jan 18 | 27.2 | 8.3 | 0.52 | 0.52 | 4.40 | 4.40 |
| Jan 19 | 27.2 | 8.3 | 0.56 | 0.56 | 4.70 | 4.70 |
| Jan 20 | 27.3 | 8.2 | 0.59 | 0.59 | 5.00 | 5.00 |
| Jan 21 | 27.3 | 8.2 | 0.62 | 0.62 | 5.30 | 5.30 |
| Jan 22 | 27.4 | 8.1 | 0.65 | 0.65 | 5.60 | 5.60 |
| Jan 23 | 27.5 | 8.1 | 0.68 | 0.68 | 5.90 | 5.90 |
| Jan 24 | 27.5 | 8.2 | 0.72 | 0.72 | 6.20 | 6.20 |
| Jan 25 | 27.6 | 8.2 | 0.75 | 0.75 | 6.50 | 6.50 |
| Jan 26 | 27.7 | 8.2 | 0.79 | 0.79 | 6.80 | 6.80 |
| Jan 27 | 27.9 | 8.3 | 0.82 | 0.82 | 7.00 | 7.00 |
| Jan 28 | 28.0 | 8.4 | 0.86 | 0.86 | 7.30 | 7.30 |
| Jan 29 | 28.1 | 8.5 | 0.89 | 0.89 | 7.60 | 7.60 |
| Jan 30 | 28.3 | 8.7 | 0.92 | 0.92 | 7.90 | 7.90 |
| Jan 31 | 28.5 | 8.8 | 0.96 | 0.96 | 8.20 | 8.20 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Jefferson - July 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Jul 1 | 90.0 | 75.9 | – |
| Jul 2 | 86.0 | 75.0 | – |
| Jul 3 | 88.0 | – | – |
| Jul 4 | – | 64.9 | 0.31 |
| Jul 5 | 84.0 | 66.9 | 0.07 |
| Jul 6 | 84.0 | 66.0 | 0.00 |
| Jul 7 | 84.9 | 66.9 | 0.00 |
| Jul 8 | 87.1 | 68.0 | 0.00 |
| Jul 9 | 88.0 | 66.0 | 0.36 |
| Jul 10 | 82.0 | 66.0 | 0.00 |
| Jul 11 | – | – | 0.00 |
| Jul 12 | – | – | 0.00 |
| Jul 13 | – | – | 0.00 |
| Jul 14 | 86.0 | 62.1 | 0.00 |
| Jul 15 | 87.1 | 66.0 | 0.00 |
| Jul 16 | 87.1 | 68.0 | 0.00 |
| Jul 17 | 89.1 | 68.0 | 0.00 |
| Jul 18 | 91.0 | 70.0 | 0.00 |
| Jul 19 | – | – | 0.00 |
| Jul 20 | 86.0 | 61.0 | 0.00 |
| Jul 21 | 96.1 | 68.0 | 0.08 |
| Jul 22 | 78.1 | 57.0 | 0.00 |
| Jul 23 | 73.9 | 57.0 | 0.00 |
| Jul 24 | – | – | – |
| Jul 25 | – | – | – |
| Jul 26 | – | – | 0.00 |
| Jul 27 | 96.1 | – | 0.00 |
| Jul 28 | 93.9 | 72.0 | 0.00 |
| Jul 29 | – | – | 0.00 |
| Jul 30 | 86.0 | 68.0 | 0.00 |
| Jul 31 | – | – | – |
The data for July 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 temperature96.1ºF · Jul 21
- Lowest max temperature73.9ºF · Jul 23
- Highest min temperature75.9ºF · Jul 1
- Lowest min temperature57.0ºF · Jul 22
Geo Jefferson - Iowa
Location
- Country
- United States
- State
- Iowa
- County
- Greene
- City
- Jefferson
- Zip Code
- 50129
- Elevation
- 1043 ft
- Longitude
- -94.34
- Latitude
- 42.01
- ICAO
- –
- IATA
- –