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Boston vs Dallas weather: climate comparison
Dallas is the warmer of the two, averaging 67°F (20°C) over the year against 51°F (11°C) in Boston. Boston is wetter, with 45.4 in (1154 mm) of precipitation a year to Dallas's 43.0 in (1092 mm). Below: every month side by side, from 30 years of ERA5 data (1996–2025).
- Mean temperature
- 10.6°C Boston
19.7°C Dallas - Annual precipitation
- 1154.0 mm Boston
1091.9 mm Dallas - Rainy days a year
- 121 Boston
94 Dallas - Sunshine per day
- 8.6 h Boston
9.4 h Dallas
Month by month
| Month | Boston | Dallas |
|---|---|---|
| January | 1.9°C | 13.4°C |
| February | 3.5°C | 15.5°C |
| March | 7.5°C | 20.1°C |
| April | 13.5°C | 24.2°C |
| May | 19.1°C | 28.3°C |
| June | 24.4°C | 32.2°C |
| July | 27.9°C | 34.7°C |
| August | 26.9°C | 34.9°C |
| September | 22.9°C | 31.2°C |
| October | 16.5°C | 25.7°C |
| November | 10.2°C | 19.3°C |
| December | 5.0°C | 14.6°C |
Year at a glance
| Measure | Boston | Dallas |
|---|---|---|
| Mean annual temperature | 10.6°C | 19.7°C |
| Warmest month (avg high) | Jul · 28°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 | 1154.0 mm | 1091.9 mm |
| Rainy days per year | 121 | 94 |
| Wettest / driest month | Mar / Feb | May / Jul |
| Average sunshine per day | 8.6 h | 9.4 h |
In short: Dallas is the warmest overall (19.7°C mean); Boston gets the most precipitation (1154.0 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: Boston 40.3°C (2011-07-22), Dallas 42.9°C (2023-08-18). Record low: Boston -26.4°C (2016-02-14), 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 Boston (42.36, -71.13) and Dallas (32.79, -96.82).
Which months differ most?
The gap in average highs is widest in March, when Dallas runs 23°F / 13°C warmer, and narrowest in July (12°F / 7°C apart). The biggest rainfall difference is in May: Dallas 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 Boston climate and Dallas climate pages.
Compare Boston or Dallas with another city
Questions people ask
Is Boston warmer than Dallas?
Dallas is warmer on average: its mean annual temperature is 67°F (20°C) against 51°F (11°C) in Boston (ERA5, 1996–2025).
Which gets more rain, Boston or Dallas?
Boston, with about 45.4 in (1154 mm) of precipitation a year and 121 days with at least 1 mm, compared with 43.0 in (1092 mm) and 94 days in Dallas.
Which is sunnier, Boston or Dallas?
Dallas averages more sunshine: 9.4 h a day against 8.6 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.