Climate averages 1991–2020
Portsmouth Heights weather
in January.
A cool, moderately wet month: the coolest and the joint 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cool month in Portsmouth Heights: daytime highs average 9.3°C and nights cool to about 0.8°C. By daytime temperature it is the coolest month of the year.
Expect about 87 mm of rain on roughly 9 days, which makes January a moderately wet month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 57 min on an average January day.
The nearest other city in this atlas is Norfolk (8 km away). In January its highs average 9.2°C, about as warm as Portsmouth Heights, with 87 mm of rain.
Among the 498 cities listed in the United States, Portsmouth Heights ranks joint 254th of 498 for the warmest January highs and joint 331st of 498 for the driest January (rainfall, lowest first). The mean January high of those 498 cities is 9.5°C; Portsmouth Heights is 0.1°C cooler than that mean.
From January to February, average highs rise by 1.7°C to 11.0°C, and monthly rainfall falls from 87 mm to 77 mm.
The annual picture
January 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
Portsmouth Heights climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 9.3°C0.8°C | 0.8°C | 87 | 9.0 | 9.910 h |
| February | 11.0°C1.6°C | 1.6°C | 77 | 9.0 | 10.811 h |
| March | 14.7°C4.8°C | 4.8°C | 98 | 10.4 | 11.912 h |
| April | 20.2°C9.9°C | 9.9°C | 84 | 9.7 | 13.113 h |
| May | 24.5°C14.9°C | 14.9°C | 95 | 10.9 | 14.114 h |
| June | 28.5°C19.6°C | 19.6°C | 103 | 11.7 | 14.615 h |
| July | 30.6°C22.3°C | 22.3°C | 131 | 15.1 | 14.414 h |
| August | 29.5°C21.6°C | 21.6°C | 119 | 12.9 | 13.614 h |
| September | 26.4°C18.8°C | 18.8°C | 120 | 11.1 | 12.512 h |
| October | 21.2°C12.9°C | 12.9°C | 94 | 7.9 | 11.311 h |
| November | 15.6°C7.0°C | 7.0°C | 87 | 8.5 | 10.210 h |
| December | 11.4°C3.1°C | 3.1°C | 87 | 9.2 | 9.710 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
January in nearby cities
- Norfolk in JanuaryUnited States · 8 kmHigh 9.2°C · Low 1.0°C · 87 mm rain
- Newport News in JanuaryUnited States · 19 kmHigh 9.1°C · Low 0.9°C · 87 mm rain
- Suffolk in JanuaryUnited States · 22 kmHigh 9.5°C · Low 1.1°C · 88 mm rain
- East Hampton in JanuaryUnited States · 24 kmHigh 8.6°C · Low 1.2°C · 91 mm rain
- Virginia Beach in JanuaryUnited States · 35 kmHigh 8.4°C · Low 2.4°C · 96 mm rain
- Richmond in JanuaryUnited States · 126 kmHigh 7.9°C · Low -0.8°C · 85 mm rain
- Greenville in JanuaryUnited States · 161 kmHigh 10.9°C · Low 1.9°C · 94 mm rain
- Alexandria, United States in JanuaryUnited States · 228 kmHigh 6.1°C · Low -1.9°C · 77 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 Portsmouth Heights) is explained once on the Portsmouth Heights year overview and on the Sources, method and limits page.
Norfolk lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.