Humid subtropical climate
Climate Alton - Missouri
Annual high69ºF
Annual low44ºF
Precipitation45.11 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 45 | 22 | 2.72 |
| Feb | 50 | 25 | 3.09 |
| Mar | 59 | 33 | 3.96 |
| Apr | 70 | 43 | 4.34 |
| May | 77 | 53 | 4.79 |
| Jun | 85 | 61 | 3.02 |
| Jul | 90 | 66 | 3.79 |
| Aug | 89 | 64 | 2.68 |
| Sep | 82 | 55 | 3.98 |
| Oct | 71 | 44 | 3.95 |
| Nov | 59 | 34 | 4.82 |
| Dec | 47 | 24 | 3.97 |
- JanHigh 45ºFLow 22ºFPrecip 2.72 inch
- FebHigh 50ºFLow 25ºFPrecip 3.09 inch
- MarHigh 59ºFLow 33ºFPrecip 3.96 inch
- AprHigh 70ºFLow 43ºFPrecip 4.34 inch
- MayHigh 77ºFLow 53ºFPrecip 4.79 inch
- JunHigh 85ºFLow 61ºFPrecip 3.02 inch
- JulHigh 90ºFLow 66ºFPrecip 3.79 inch
- AugHigh 89ºFLow 64ºFPrecip 2.68 inch
- SepHigh 82ºFLow 55ºFPrecip 3.98 inch
- OctHigh 71ºFLow 44ºFPrecip 3.95 inch
- NovHigh 59ºFLow 34ºFPrecip 4.82 inch
- DecHigh 47ºFLow 24ºFPrecip 3.97 inch
Climate summary
What is the average weather in Alton, Missouri?
Alton experiences a humid subtropical climate with a very strong seasonal temperature contrast due to its inland location. Summers are hot, while winters are cold. The area is fairly wet, with rainfall spread fairly evenly through the year, though spring is the wettest season. Heavy seasonal downpours can sometimes occur during the warmer months.
Alton weather averages
Annual high69ºF
Annual low44ºF
Precipitation45.11 inch
Daily normals Alton - Missouri - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 43.6 | 23.4 | 0.10 | 0.10 | 0.00 | 0.00 |
| Jan 2 | 43.6 | 23.3 | 0.19 | 0.19 | 0.10 | 0.10 |
| Jan 3 | 43.5 | 23.2 | 0.29 | 0.29 | 0.10 | 0.10 |
| Jan 4 | 43.5 | 23.1 | 0.39 | 0.39 | 0.20 | 0.20 |
| Jan 5 | 43.4 | 23.0 | 0.49 | 0.49 | 0.20 | 0.20 |
| Jan 6 | 43.4 | 22.9 | 0.58 | 0.58 | 0.30 | 0.30 |
| Jan 7 | 43.4 | 22.8 | 0.68 | 0.68 | 0.40 | 0.40 |
| Jan 8 | 43.4 | 22.7 | 0.78 | 0.78 | 0.40 | 0.40 |
| Jan 9 | 43.4 | 22.6 | 0.88 | 0.88 | 0.50 | 0.50 |
| Jan 10 | 43.3 | 22.5 | 0.99 | 0.99 | 0.60 | 0.60 |
| Jan 11 | 43.4 | 22.5 | 1.09 | 1.09 | 0.60 | 0.60 |
| Jan 12 | 43.4 | 22.4 | 1.19 | 1.19 | 0.70 | 0.70 |
| Jan 13 | 43.4 | 22.3 | 1.29 | 1.29 | 0.80 | 0.80 |
| Jan 14 | 43.4 | 22.3 | 1.39 | 1.39 | 0.80 | 0.80 |
| Jan 15 | 43.4 | 22.2 | 1.49 | 1.49 | 0.90 | 0.90 |
| Jan 16 | 43.5 | 22.1 | 1.58 | 1.58 | 1.00 | 1.00 |
| Jan 17 | 43.5 | 22.1 | 1.68 | 1.68 | 1.00 | 1.00 |
| Jan 18 | 43.6 | 22.1 | 1.78 | 1.78 | 1.10 | 1.10 |
| Jan 19 | 43.7 | 22.0 | 1.87 | 1.87 | 1.10 | 1.10 |
| Jan 20 | 43.7 | 22.0 | 1.96 | 1.96 | 1.20 | 1.20 |
| Jan 21 | 43.8 | 22.0 | 2.05 | 2.05 | 1.20 | 1.20 |
| Jan 22 | 43.9 | 22.0 | 2.14 | 2.14 | 1.30 | 1.30 |
| Jan 23 | 44.0 | 22.0 | 2.22 | 2.22 | 1.30 | 1.30 |
| Jan 24 | 44.1 | 22.0 | 2.31 | 2.31 | 1.40 | 1.40 |
| Jan 25 | 44.2 | 22.0 | 2.40 | 2.40 | 1.40 | 1.40 |
| Jan 26 | 44.4 | 22.0 | 2.49 | 2.49 | 1.50 | 1.50 |
| Jan 27 | 44.5 | 22.1 | 2.58 | 2.58 | 1.50 | 1.50 |
| Jan 28 | 44.6 | 22.1 | 2.67 | 2.67 | 1.60 | 1.60 |
| Jan 29 | 44.8 | 22.2 | 2.77 | 2.77 | 1.60 | 1.60 |
| Jan 30 | 45.0 | 22.3 | 2.86 | 2.86 | 1.70 | 1.70 |
| Jan 31 | 45.1 | 22.3 | 2.96 | 2.96 | 1.70 | 1.70 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Alton - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 93.0 | 57.9 | 0.00 |
| Oct 2 | 91.0 | 66.9 | 1.53 |
| Oct 3 | – | – | – |
| Oct 4 | – | – | – |
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| 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 temperature93.0ºF · Oct 1
- Lowest max temperature91.0ºF · Oct 2
- Highest min temperature66.9ºF · Oct 2
- Lowest min temperature57.9ºF · Oct 1
Geo Alton - Missouri
Location
- Country
- United States
- State
- Missouri
- County
- Oregon
- City
- Alton
- Zip Code
- 65606
- Elevation
- 768 ft
- Longitude
- -91.40
- Latitude
- 36.69
- ICAO
- –
- IATA
- –