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Chicago vs Dallas weather: climate comparison
Dallas is the warmer of the two, averaging 67°F (20°C) over the year against 50°F (10°C) in Chicago. Dallas is wetter, with 43.0 in (1092 mm) of precipitation a year to Chicago's 38.7 in (982 mm). Below: every month side by side, from 30 years of ERA5 data (1996–2025).
- Mean temperature
- 10.1°C Chicago
19.7°C Dallas - Annual precipitation
- 982.3 mm Chicago
1091.9 mm Dallas - Rainy days a year
- 121 Chicago
94 Dallas - Sunshine per day
- 8.8 h Chicago
9.4 h Dallas
Month by month
| Month | Chicago | Dallas |
|---|---|---|
| January | -0.9°C | 13.4°C |
| February | 0.6°C | 15.5°C |
| March | 5.4°C | 20.1°C |
| April | 11.4°C | 24.2°C |
| May | 17.9°C | 28.3°C |
| June | 24.2°C | 32.2°C |
| July | 26.6°C | 34.7°C |
| August | 25.8°C | 34.9°C |
| September | 22.5°C | 31.2°C |
| October | 15.6°C | 25.7°C |
| November | 8.3°C | 19.3°C |
| December | 2.2°C | 14.6°C |
Year at a glance
| Measure | Chicago | Dallas |
|---|---|---|
| Mean annual temperature | 10.1°C | 19.7°C |
| Warmest month (avg high) | Jul · 27°C | Aug · 35°C |
| Coldest month (avg low) | Jan · -7°C | Jan · 4°C |
| Annual range (warmest high − coldest low) | 34°C | 31°C |
| Annual precipitation | 982.3 mm | 1091.9 mm |
| Rainy days per year | 121 | 94 |
| Wettest / driest month | May / Feb | May / Jul |
| Average sunshine per day | 8.8 h | 9.4 h |
In short: Dallas is the warmest overall (19.7°C mean); Dallas gets the most precipitation (1091.9 mm a year); Dallas is the sunniest (9.4 h a day on average); Dallas has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Chicago 37.4°C (2022-06-21), Dallas 42.9°C (2023-08-18). Record low: Chicago -32.5°C (2019-01-31), Dallas -18.9°C (2021-02-16).
Source: Open-Meteo Historical Weather API (CC BY 4.0). Values are ERA5 reanalysis model data on a ~9–25 km grid, not readings from a weather station, so a single town’s thermometer can differ by a few degrees and local showers can be missed. Monthly means of daily ERA5 values, 1996–2025, for the grid cells nearest Chicago (41.86, -87.65) and Dallas (32.79, -96.82).
Which months differ most?
The gap in average highs is widest in February, when Dallas runs 27°F / 15°C warmer, and narrowest in June (14°F / 8°C apart). The biggest rainfall difference is in July: Chicago gets 2.0 in (51 mm) more on average.
Add a third or fourth city, or swap in any other place, in the full comparison tool. For one city in depth, see the Chicago climate and Dallas climate pages.
Compare Chicago or Dallas with another city
Questions people ask
Is Chicago warmer than Dallas?
Dallas is warmer on average: its mean annual temperature is 67°F (20°C) against 50°F (10°C) in Chicago (ERA5, 1996–2025).
Which gets more rain, Chicago or Dallas?
Dallas, with about 43.0 in (1092 mm) of precipitation a year and 94 days with at least 1 mm, compared with 38.7 in (982 mm) and 121 days in Chicago.
Which is sunnier, Chicago or Dallas?
Dallas averages more sunshine: 9.4 h a day against 8.8 h. Sunshine duration is modelled from cloud cover.
How reliable is this comparison?
Both cities use the same 30-year reanalysis, so differences are consistent. Absolute values describe a grid cell several kilometres wide and can differ by a degree or two from the airport station.