Best time to visit Decatur

Find the best time to visit Decatur and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Decatur by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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When is the best time to visit Decatur?

The best time to visit Decatur is May based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

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Max Day Temperature (°C)

  • 1°C maximum daytime temperature in January in Decatur1
    Jan
  • 4°C maximum daytime temperature in February in Decatur4
    Feb
  • 11°C maximum daytime temperature in March in Decatur11
    Mar
  • 18°C maximum daytime temperature in April in Decatur18
    Apr
  • 24°C maximum daytime temperature in May in Decatur24
    May
  • 29°C maximum daytime temperature in June in Decatur29
    Jun
  • 31°C maximum daytime temperature in July in Decatur31
    Jul
  • 29°C maximum daytime temperature in August in Decatur29
    Aug
  • 26°C maximum daytime temperature in September in Decatur26
    Sep
  • 20°C maximum daytime temperature in October in Decatur20
    Oct
  • 11°C maximum daytime temperature in November in Decatur11
    Nov
  • 3°C maximum daytime temperature in December in Decatur3
    Dec

Hours of Sunshine (daily)

Which is the hottest month in Decatur?

The hottest time of year in Decatur is normally July. Expect maximum daytime temperatures to reach 31°C with high heat and humidity.

Which month has the most rain in Decatur?

In terms of rainfall, July is usually the wettest month in Decatur with 107mm on average. There are normally 9 days in July with some rain.

When is it sunniest in Decatur?

The sunniest time of year in Decatur is normally July with bright sunshine on average for 70% of daylight hours; that's 10 hours of sunshine per day.

Best time to visit

The weather guide for Illinois (Decatur) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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