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Lochearn, Maryland climate
Cfa Humid subtropical
Lochearn has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 89°F, while the coldest is January averaging around 25°F at night. Precipitation is fairly even year-round, totalling about 45 inches. Light snow accumulates each winter (19 inches 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 countsLochearn climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 43 | 46 | 55 | 67 | 76 | 84 | 89 | 87 | 80 | 68 | 57 | 48 |
| Avg temp (°F) | 34 | 37 | 44 | 55 | 64 | 74 | 78 | 76 | 69 | 57 | 47 | 39 |
| Avg low (°F) | 25 | 27 | 34 | 44 | 53 | 63 | 68 | 66 | 59 | 47 | 37 | 30 |
| Precipitation (in) | 3.1 | 2.9 | 4.0 | 3.4 | 3.9 | 4.0 | 4.5 | 4.1 | 4.4 | 3.9 | 3.1 | 3.7 |
| Snowfall (in) | 6.4 | 7.5 | 2.8 | — | — | — | — | — | — | — | 0.1 | 2.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 43 | 46 | 55 | 67 | 76 | 84 |
| Avg temp (°F) | 34 | 37 | 44 | 55 | 64 | 74 |
| Avg low (°F) | 25 | 27 | 34 | 44 | 53 | 63 |
| Precipitation (in) | 3.1 | 2.9 | 4.0 | 3.4 | 3.9 | 4.0 |
| Snowfall (in) | 6.4 | 7.5 | 2.8 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 87 | 80 | 68 | 57 | 48 |
| Avg temp (°F) | 78 | 76 | 69 | 57 | 47 | 39 |
| Avg low (°F) | 68 | 66 | 59 | 47 | 37 | 30 |
| Precipitation (in) | 4.5 | 4.1 | 4.4 | 3.9 | 3.1 | 3.7 |
| Snowfall (in) | — | — | — | — | 0.1 | 2.5 |
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 | 12 | 11 | 10 | 10 | 9 | 9 | 9 | 10 |
| Days with high ≥ 90°F (days) | — | — | — | 0.4 | 2 | 7 | 13 | 8 | 3 | 0.2 | — | — |
| Days with low ≤ 32°F (days) | 24 | 21 | 14 | 2 | — | — | — | — | — | 1.0 | 10 | 21 |
| Days with snowfall ≥ 1 in (days) | 2 | 2 | 0.8 | — | — | — | — | — | — | — | 0.0 | 0.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 11 | 11 | 12 | 11 |
| Days with high ≥ 90°F (days) | — | — | — | 0.4 | 2 | 7 |
| Days with low ≤ 32°F (days) | 24 | 21 | 14 | 2 | — | — |
| Days with snowfall ≥ 1 in (days) | 2 | 2 | 0.8 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 10 | 9 | 9 | 9 | 10 |
| Days with high ≥ 90°F (days) | 13 | 8 | 3 | 0.2 | — | — |
| Days with low ≤ 32°F (days) | — | — | — | 1.0 | 10 | 21 |
| Days with snowfall ≥ 1 in (days) | — | — | — | — | 0.0 | 0.8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 63 | 63 | 63 | 63 | 59 | 55 | 55 | 55 | 54 | 59 | 64 |
| Clear days (≤ 30% cloud) | 5 | 5 | 6 | 6 | 5 | 6 | 7 | 8 | 9 | 9 | 6 | 5 |
| Partly cloudy days (30–70%) | 12 | 10 | 10 | 9 | 11 | 12 | 12 | 12 | 10 | 10 | 10 | 11 |
| Cloudy days (≥ 70%) | 14 | 14 | 15 | 15 | 15 | 12 | 11 | 11 | 12 | 12 | 13 | 15 |
| Relative humidity (%) | 83 | 81 | 79 | 77 | 77 | 74 | 68 | 69 | 71 | 75 | 78 | 83 |
| Wind speed (mph) | 7.1 | 7.2 | 7.3 | 6.7 | 5.5 | 4.9 | 4.5 | 4.5 | 5.3 | 5.8 | 6.2 | 6.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 63 | 63 | 63 | 63 | 59 |
| Clear days (≤ 30% cloud) | 5 | 5 | 6 | 6 | 5 | 6 |
| Partly cloudy days (30–70%) | 12 | 10 | 10 | 9 | 11 | 12 |
| Cloudy days (≥ 70%) | 14 | 14 | 15 | 15 | 15 | 12 |
| Relative humidity (%) | 83 | 81 | 79 | 77 | 77 | 74 |
| Wind speed (mph) | 7.1 | 7.2 | 7.3 | 6.7 | 5.5 | 4.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 55 | 55 | 54 | 59 | 64 |
| Clear days (≤ 30% cloud) | 7 | 8 | 9 | 9 | 6 | 5 |
| Partly cloudy days (30–70%) | 12 | 12 | 10 | 10 | 10 | 11 |
| Cloudy days (≥ 70%) | 11 | 11 | 12 | 12 | 13 | 15 |
| Relative humidity (%) | 68 | 69 | 71 | 75 | 78 | 83 |
| Wind speed (mph) | 4.5 | 4.5 | 5.3 | 5.8 | 6.2 | 6.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Baltimore-washington Intl AP (NOAA GHCN station USW00093721), about 19 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.