Hot-summer humid continental climate
Climate Marshalltown - Iowa
Annual high58ºF
Annual low37ºF
Precipitation37.35 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 28 | 9 | 0.86 | 5 |
| Feb | 33 | 13 | 1.01 | 5 |
| Mar | 46 | 25 | 2.28 | 5 |
| Apr | 60 | 36 | 3.63 | 1 |
| May | 71 | 48 | 4.73 | 0 |
| Jun | 80 | 59 | 5.57 | 0 |
| Jul | 84 | 63 | 4.99 | 0 |
| Aug | 82 | 60 | 4.53 | 0 |
| Sep | 75 | 50 | 3.70 | 0 |
| Oct | 62 | 38 | 2.65 | 0 |
| Nov | 46 | 26 | 2.16 | 1 |
| Dec | 32 | 13 | 1.24 | 8 |
- JanHigh 28ºFLow 9ºFPrecip 0.86 inch
- FebHigh 33ºFLow 13ºFPrecip 1.01 inch
- MarHigh 46ºFLow 25ºFPrecip 2.28 inch
- AprHigh 60ºFLow 36ºFPrecip 3.63 inch
- MayHigh 71ºFLow 48ºFPrecip 4.73 inch
- JunHigh 80ºFLow 59ºFPrecip 5.57 inch
- JulHigh 84ºFLow 63ºFPrecip 4.99 inch
- AugHigh 82ºFLow 60ºFPrecip 4.53 inch
- SepHigh 75ºFLow 50ºFPrecip 3.70 inch
- OctHigh 62ºFLow 38ºFPrecip 2.65 inch
- NovHigh 46ºFLow 26ºFPrecip 2.16 inch
- DecHigh 32ºFLow 13ºFPrecip 1.24 inch
Climate summary
What is the average weather in Marshalltown, Iowa?
Marshalltown experiences a humid continental climate, marked by a very large seasonal temperature contrast. Summers are warm and fairly wet, with precipitation peaking in June. Winters are cold and bring regular snowfall, with January typically being the driest month. Precipitation is spread relatively evenly through the year, with winter moisture often arriving as snow.
Marshalltown weather averages
Annual high58ºF
Annual low37ºF
Precipitation37.35 inch
Snowfall25 inch
Daily normals Marshalltown - Iowa - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 28.6 | 11.2 | 0.03 | 0.03 | 0.20 | 0.20 |
| Jan 2 | 28.4 | 11.0 | 0.07 | 0.07 | 0.50 | 0.50 |
| Jan 3 | 28.2 | 10.7 | 0.11 | 0.11 | 0.70 | 0.70 |
| Jan 4 | 28.0 | 10.5 | 0.14 | 0.14 | 0.90 | 0.90 |
| Jan 5 | 27.9 | 10.3 | 0.17 | 0.17 | 1.20 | 1.20 |
| Jan 6 | 27.7 | 10.1 | 0.21 | 0.21 | 1.40 | 1.40 |
| Jan 7 | 27.6 | 9.9 | 0.24 | 0.24 | 1.60 | 1.60 |
| Jan 8 | 27.5 | 9.7 | 0.27 | 0.27 | 1.90 | 1.90 |
| Jan 9 | 27.4 | 9.5 | 0.30 | 0.30 | 2.10 | 2.10 |
| Jan 10 | 27.3 | 9.3 | 0.34 | 0.34 | 2.30 | 2.30 |
| Jan 11 | 27.2 | 9.1 | 0.37 | 0.37 | 2.50 | 2.50 |
| Jan 12 | 27.1 | 9.0 | 0.40 | 0.40 | 2.70 | 2.70 |
| Jan 13 | 27.1 | 8.8 | 0.43 | 0.43 | 3.00 | 3.00 |
| Jan 14 | 27.0 | 8.7 | 0.46 | 0.46 | 3.20 | 3.20 |
| Jan 15 | 27.0 | 8.6 | 0.49 | 0.49 | 3.40 | 3.40 |
| Jan 16 | 27.0 | 8.5 | 0.52 | 0.52 | 3.60 | 3.60 |
| Jan 17 | 27.0 | 8.4 | 0.55 | 0.55 | 3.70 | 3.70 |
| Jan 18 | 27.0 | 8.3 | 0.58 | 0.58 | 3.90 | 3.90 |
| Jan 19 | 27.0 | 8.2 | 0.61 | 0.61 | 4.10 | 4.10 |
| Jan 20 | 27.1 | 8.2 | 0.64 | 0.64 | 4.30 | 4.30 |
| Jan 21 | 27.1 | 8.1 | 0.67 | 0.67 | 4.50 | 4.50 |
| Jan 22 | 27.2 | 8.1 | 0.70 | 0.70 | 4.70 | 4.70 |
| Jan 23 | 27.2 | 8.1 | 0.73 | 0.73 | 4.90 | 4.90 |
| Jan 24 | 27.3 | 8.1 | 0.76 | 0.76 | 5.00 | 5.00 |
| Jan 25 | 27.4 | 8.1 | 0.79 | 0.79 | 5.20 | 5.20 |
| Jan 26 | 27.5 | 8.2 | 0.82 | 0.82 | 5.40 | 5.40 |
| Jan 27 | 27.6 | 8.3 | 0.85 | 0.85 | 5.60 | 5.60 |
| Jan 28 | 27.8 | 8.3 | 0.88 | 0.88 | 5.80 | 5.80 |
| Jan 29 | 27.9 | 8.4 | 0.91 | 0.91 | 6.00 | 6.00 |
| Jan 30 | 28.1 | 8.6 | 0.94 | 0.94 | 6.10 | 6.10 |
| Jan 31 | 28.3 | 8.7 | 0.97 | 0.97 | 6.30 | 6.30 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Marshalltown - August 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Aug 1 | 79.0 | 62.1 | 0.46 |
| Aug 2 | 81.0 | 61.0 | 0.00 |
| Aug 3 | 82.0 | 60.1 | 0.00 |
| Aug 4 | 82.9 | 60.1 | 0.00 |
| Aug 5 | 73.9 | 61.0 | 0.40 |
| Aug 6 | 71.1 | 61.0 | 0.02 |
| Aug 7 | 82.0 | 63.0 | 0.00 |
| Aug 8 | 84.0 | 59.0 | 0.00 |
| Aug 9 | 82.0 | 59.0 | 0.10 |
| Aug 10 | 84.9 | 68.0 | 0.15 |
| Aug 11 | 91.0 | 69.1 | 0.05 |
| Aug 12 | 91.0 | 71.1 | 0.30 |
| Aug 13 | – | – | – |
| Aug 14 | – | – | – |
| Aug 15 | – | – | – |
| Aug 16 | – | – | – |
| Aug 17 | – | – | – |
| Aug 18 | – | – | – |
| Aug 19 | – | – | – |
| Aug 20 | – | – | – |
| Aug 21 | – | – | – |
| Aug 22 | – | – | – |
| Aug 23 | – | – | – |
| Aug 24 | – | – | – |
| Aug 25 | – | – | – |
| Aug 26 | – | – | – |
| Aug 27 | – | – | – |
| Aug 28 | – | – | – |
| Aug 29 | – | – | – |
| Aug 30 | – | – | – |
| Aug 31 | – | – | – |
The data for August 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 temperature91.0ºF · Aug 11
- Lowest max temperature71.1ºF · Aug 6
- Highest min temperature71.1ºF · Aug 12
- Lowest min temperature59.0ºF · Aug 8
Geo Marshalltown - Iowa
Location
- Country
- United States
- State
- Iowa
- County
- Marshall
- City
- Marshalltown
- Zip Code
- 50158
- Elevation
- 971 ft
- Longitude
- -92.92
- Latitude
- 42.11
- ICAO
- –
- IATA
- –