Besttimetovisit.com.pkClimate of Decatur
Decatur has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for Decatur is 16° degrees and there is about 318 mm of rain in a year. It is dry for 206 days a year with an average humidity of 77% and an UV-index of 4.
Climate averages for the whole year
- Day: the average daily temperature during the day is between 0°C and 28°C
- Night:the average nighttime temperature is between -6°C and 19°C
- Rain: it rains 120 days and there is a total of approximately 317 mm rainfall
- Snow: it snows an average of 22 days per year
- Sun hours: throughout the year there are 2740 sun hours
| Maximum temperature: | between 0°C and 28°C |
| Warmest month: | 28°C in July |
| Coldest month: | 0°C in January |
| Night temperature: | between -6°C and 19°C |
| Dry days: | 223 days |
| Days with rain: | 120 days |
| Days with snow: | 22 days |
| Total rain sum: | 317 mm |
| Hours of sunshine: | 2740 hours |
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Temperature graph
This graph shows the average maximum temperature (red) and minimum temperature (blue) for Decatur.
Precipitation graph
This graph shows the average amount of rainfall per month for Decatur.
Climate table of Decatur
In this climate table you can see at a glance what the average weather per month is for Decatur. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Decatur might be like in a given month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day temp. (°C) | 0 | 3 | 10 | 17 | 23 | 27 | 28 | 28 | 25 | 18 | 10 | 3 |
| Night temp. (°C) | -6 | -4 | 2 | 8 | 14 | 18 | 19 | 18 | 15 | 9 | 3 | -2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Precipitation (mm) | 18 | 16 | 27 | 38 | 35 | 37 | 26 | 28 | 24 | 24 | 23 | 21 |
| Days with rain | 6 | 6 | 11 | 13 | 15 | 12 | 13 | 10 | 10 | 9 | 8 | 7 |
| Days with snow | 7 | 5 | 3 | - | - | - | - | - | - | - | 2 | 5 |
| Dry days | 18 | 17 | 17 | 17 | 16 | 18 | 18 | 21 | 20 | 22 | 20 | 19 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Sun hours per day | 4 | 4 | 6 | 8 | 10 | 11 | 10 | 10 | 9 | 6 | 5 | 4 |
| Wind force (Bft) | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 3 | 3 | 3 | 3 |
| UV-index | 2 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 2 |
Best time to visit Decatur
The best time to visit Decatur in the state of Illinois is from May through October. In this period you have a warm temperature and almost no precipitation. The highest average temperature in Decatur is 28°C in July and the lowest is 0°C in January.
Climate of Decatur by month
What is the average climate in a given month for Decatur? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.
Decatur weather experiences
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