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Boston vs Los Angeles weather: climate comparison
Los Angeles is the warmer of the two, averaging 65°F (19°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 Los Angeles's 14.0 in (355 mm). Below: every month side by side, from 30 years of ERA5 data (1996–2025).
- Mean temperature
- 10.6°C Boston
18.6°C Los Angeles - Annual precipitation
- 1154.0 mm Boston
355.0 mm Los Angeles - Rainy days a year
- 121 Boston
32 Los Angeles - Sunshine per day
- 8.6 h Boston
11.0 h Los Angeles
Month by month
| Month | Boston | Los Angeles |
|---|---|---|
| January | 1.9°C | 19.1°C |
| February | 3.5°C | 19.3°C |
| March | 7.5°C | 20.9°C |
| April | 13.5°C | 23.2°C |
| May | 19.1°C | 25.1°C |
| June | 24.4°C | 27.9°C |
| July | 27.9°C | 31.2°C |
| August | 26.9°C | 32.2°C |
| September | 22.9°C | 30.8°C |
| October | 16.5°C | 27.2°C |
| November | 10.2°C | 22.9°C |
| December | 5.0°C | 18.8°C |
Year at a glance
| Measure | Boston | Los Angeles |
|---|---|---|
| Mean annual temperature | 10.6°C | 18.6°C |
| Warmest month (avg high) | Jul · 28°C | Aug · 32°C |
| Coldest month (avg low) | Jan · -7°C | Dec · 7°C |
| Annual range (warmest high − coldest low) | 34°C | 25°C |
| Annual precipitation | 1154.0 mm | 355.0 mm |
| Rainy days per year | 121 | 32 |
| Wettest / driest month | Mar / Feb | Feb / Jul |
| Average sunshine per day | 8.6 h | 11.0 h |
In short: Los Angeles is the warmest overall (18.6°C mean); Boston gets the most precipitation (1154.0 mm a year); Los Angeles is the sunniest (11.0 h a day on average); Los Angeles has the smallest swing between its warmest and coldest months.
Record high 1996–2025: Boston 40.3°C (2011-07-22), Los Angeles 45.7°C (2024-09-06). Record low: Boston -26.4°C (2016-02-14), Los Angeles -1.9°C (2013-01-14).
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 Los Angeles (34.06, -118.24).
Which months differ most?
The gap in average highs is widest in January, when Los Angeles runs 31°F / 17°C warmer, and narrowest in July (6°F / 3°C apart). The biggest rainfall difference is in October: Boston gets 3.7 in (95 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 Los Angeles climate pages.
Compare Boston or Los Angeles with another city
Questions people ask
Is Boston warmer than Los Angeles?
Los Angeles is warmer on average: its mean annual temperature is 65°F (19°C) against 51°F (11°C) in Boston (ERA5, 1996–2025).
Which gets more rain, Boston or Los Angeles?
Boston, with about 45.4 in (1154 mm) of precipitation a year and 121 days with at least 1 mm, compared with 14.0 in (355 mm) and 32 days in Los Angeles.
Which is sunnier, Boston or Los Angeles?
Los Angeles averages more sunshine: 11.0 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.