Region: Illinois · United States
Decatur travel guide
Decatur is a city in Illinois, United States, home to about 71,000 people.
- Best months
- September
- Nearest airport
- DEC7 km · Decatur Airport
- Currency
- USDUnited States dollar
- Time zone
- America/Chicago
- Plugs
- A, B · 120 V
- Emergency
- 911
- Language
- Carolinian, Chamorro, Hawaiian
When to go
The best time to visit Decatur
The most comfortable months for a city stay in Decatur are September. July is the warmest month, with average highs of 30 °C; June is the wettest, with about 122 mm of rain.
Comfortable means average daytime high between 18 °C and 29 °C and under 80 mm of rain in the month. Averages for 1991–2020 over the surrounding area, a grid square about 50 km across, so a coast or a nearby mountain can make the town itself warmer or cooler. Data: CRU TS v4.10, Climatic Research Unit, University of East Anglia (Open Database License).
Public holidays in United States, 2026
Shops and offices may close on these dates.
Getting there
Getting to Decatur: airports and arrival
The nearest airport with scheduled flights is Decatur Airport (DEC), about 7.0 km from the city centre in a straight line; University of Illinois Willard Airport (CMI, 61 km) and Abraham Lincoln Capital Airport (SPI, 63 km) are also within reach.
DEC · Decatur Airport
CMI · University of Illinois Willard Airport
SPI · Abraham Lincoln Capital Airport
Questions
Decatur: questions travellers ask
When is the best time to visit Decatur?
The most comfortable months for a city stay in Decatur are September. July is the warmest month, with average highs of 30 °C; June is the wettest, with about 122 mm of rain.
Which airport is closest to Decatur?
The nearest airport with scheduled flights is Decatur Airport (DEC), about 7.0 km from the city centre in a straight line; University of Illinois Willard Airport (CMI, 61 km) and Abraham Lincoln Capital Airport (SPI, 63 km) are also within reach.
What currency is used in Decatur?
United States dollar (USD).
Nearby
Destinations near Decatur
Sources: city facts from Wikidata and Wikipedia; airports from OurAirports; climate from CRU TS v4.10 (University of East Anglia Climatic Research Unit), 1991–2020 monthly means, 0.5° grid; public holidays from python-holidays (MIT); places to stay, guest scores and amenities from each operator's own public pages. How this guide is made.