Climate averages 1991–2020
Quincy weather
in July.
A warm, moderately wet month: the warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Quincy: daytime highs average 26.6°C and nights cool to about 18.8°C. By daytime temperature it is the warmest month of the year.
Expect about 73 mm of rain on roughly 10 days, which makes July a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 56 min on an average July day.
The nearest other city in this atlas is Dorchester (8 km away). In July its highs average 27.2°C, 0.6°C warmer than Quincy, with 73 mm of rain.
Among the 498 cities listed in the United States, Quincy ranks joint 446th of 498 for the warmest July highs and joint 223rd of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Quincy is 3.7°C cooler than that mean.
From July to August, average highs fall by 0.8°C to 25.8°C, and monthly rainfall rises from 73 mm to 85 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Quincy climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.0°C-5.4°C | -5.4°C | 94 | 10.0 | 9.59 h |
| February | 3.2°C-4.6°C | -4.6°C | 84 | 8.9 | 10.511 h |
| March | 6.6°C-1.2°C | -1.2°C | 116 | 11.1 | 11.912 h |
| April | 12.5°C4.2°C | 4.2°C | 100 | 11.0 | 13.313 h |
| May | 18.0°C9.7°C | 9.7°C | 81 | 10.6 | 14.615 h |
| June | 23.2°C15.2°C | 15.2°C | 87 | 10.1 | 15.215 h |
| July, selected | 26.6°C18.8°C | 18.8°C | 73 | 9.6 | 14.915 h |
| August | 25.8°C18.3°C | 18.3°C | 85 | 9.1 | 13.914 h |
| September | 21.9°C14.8°C | 14.8°C | 88 | 8.1 | 12.513 h |
| October | 15.9°C9.0°C | 9.0°C | 108 | 9.8 | 11.111 h |
| November | 10.0°C3.4°C | 3.4°C | 95 | 9.6 | 9.810 h |
| December | 4.9°C-1.6°C | -1.6°C | 115 | 10.8 | 9.29 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Dorchester in JulyUnited States · 8 kmHigh 27.2°C · Low 18.6°C · 73 mm rain
- Boston in JulyUnited States · 13 kmHigh 27.5°C · Low 18.4°C · 73 mm rain
- Brockton in JulyUnited States · 19 kmHigh 27.1°C · Low 18.7°C · 77 mm rain
- Newton in JulyUnited States · 19 kmHigh 27.7°C · Low 18.7°C · 77 mm rain
- Lynn in JulyUnited States · 24 kmHigh 25.2°C · Low 18.6°C · 74 mm rain
- Lowell in JulyUnited States · 50 kmHigh 27.8°C · Low 18.2°C · 82 mm rain
- Pawtucket in JulyUnited States · 52 kmHigh 28.3°C · Low 19.0°C · 84 mm rain
- Lawrence (Massachusetts), United States in JulyUnited States · 52 kmHigh 27.8°C · Low 18.4°C · 82 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Quincy) is explained once on the Quincy year overview and on the Sources, method and limits page.
Boston and Dorchester lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.