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Mechanicsville, Virginia climate
Cfa Humid subtropical
Mechanicsville has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 32°C, while the coldest is January averaging around −2°C at night. Precipitation is fairly even year-round, totalling about 1156 mm. Light snow accumulates each winter (22 cm of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsMechanicsville climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 15 | 21 | 25 | 30 | 32 | 31 | 27 | 22 | 16 | 11 |
| Avg temp (°C) | 4 | 5 | 9 | 15 | 19 | 24 | 26 | 25 | 22 | 16 | 10 | 5 |
| Avg low (°C) | −2 | −1 | 3 | 8 | 13 | 18 | 21 | 20 | 16 | 9 | 4 | 0 |
| Precipitation (mm) | 82 | 66 | 102 | 81 | 102 | 118 | 111 | 124 | 117 | 86 | 78 | 89 |
| Snowfall (cm) | 9 | 6 | 3 | — | — | — | — | — | — | — | — | 5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 15 | 21 | 25 | 30 |
| Avg temp (°C) | 4 | 5 | 9 | 15 | 19 | 24 |
| Avg low (°C) | −2 | −1 | 3 | 8 | 13 | 18 |
| Precipitation (mm) | 82 | 66 | 102 | 81 | 102 | 118 |
| Snowfall (cm) | 9 | 6 | 3 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 31 | 27 | 22 | 16 | 11 |
| Avg temp (°C) | 26 | 25 | 22 | 16 | 10 | 5 |
| Avg low (°C) | 21 | 20 | 16 | 9 | 4 | 0 |
| Precipitation (mm) | 111 | 124 | 117 | 86 | 78 | 89 |
| Snowfall (cm) | — | — | — | — | — | 5 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 11 | 11 | 11 | 11 | 11 | 9 | 9 | 8 | 8 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | 0.5 | 3 | 9 | 17 | 12 | 4 | 0.3 | — | — |
| Days with low ≤ 0°C (days) | 20 | 17 | 10 | 1.0 | 0.0 | — | — | — | — | 0.3 | 8 | 17 |
| Days with snowfall ≥ 2.5 cm (days) | 1 | 0.8 | 0.3 | 0.0 | — | — | — | — | — | — | — | 0.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 11 | 11 | 11 | 11 |
| Days with high ≥ 32°C (days) | — | — | — | 0.5 | 3 | 9 |
| Days with low ≤ 0°C (days) | 20 | 17 | 10 | 1.0 | 0.0 | — |
| Days with snowfall ≥ 2.5 cm (days) | 1 | 0.8 | 0.3 | 0.0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 11 | 9 | 9 | 8 | 8 | 10 |
| Days with high ≥ 32°C (days) | 17 | 12 | 4 | 0.3 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 0.3 | 8 | 17 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | — | 0.6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 61 | 61 | 60 | 60 | 58 | 56 | 55 | 54 | 50 | 54 | 59 |
| Clear days (≤ 30% cloud) | 7 | 6 | 7 | 7 | 6 | 6 | 7 | 8 | 9 | 11 | 9 | 7 |
| Partly cloudy days (30–70%) | 9 | 9 | 10 | 10 | 11 | 13 | 12 | 12 | 11 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 14 | 13 | 15 | 13 | 13 | 11 | 12 | 11 | 11 | 11 | 11 | 14 |
| Relative humidity (%) | 83 | 81 | 79 | 76 | 75 | 71 | 68 | 70 | 73 | 75 | 78 | 83 |
| Wind speed (km/h) | 3.3 | 3.7 | 3.7 | 3.5 | 3.0 | 2.7 | 2.6 | 2.5 | 2.8 | 2.8 | 2.9 | 2.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 60 | 61 | 61 | 60 | 60 | 58 |
| Clear days (≤ 30% cloud) | 7 | 6 | 7 | 7 | 6 | 6 |
| Partly cloudy days (30–70%) | 9 | 9 | 10 | 10 | 11 | 13 |
| Cloudy days (≥ 70%) | 14 | 13 | 15 | 13 | 13 | 11 |
| Relative humidity (%) | 83 | 81 | 79 | 76 | 75 | 71 |
| Wind speed (km/h) | 3.3 | 3.7 | 3.7 | 3.5 | 3.0 | 2.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 56 | 55 | 54 | 50 | 54 | 59 |
| Clear days (≤ 30% cloud) | 7 | 8 | 9 | 11 | 9 | 7 |
| Partly cloudy days (30–70%) | 12 | 12 | 11 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 12 | 11 | 11 | 11 | 11 | 14 |
| Relative humidity (%) | 68 | 70 | 73 | 75 | 78 | 83 |
| Wind speed (km/h) | 2.6 | 2.5 | 2.8 | 2.8 | 2.9 | 2.9 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Richmond Intl AP (NOAA GHCN station USW00013740), about 12 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.