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Glen Burnie, Maryland climate
Cfa Humid subtropical
Glen Burnie 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 −4°C at night. Precipitation is fairly even year-round, totalling about 1143 mm. Light snow accumulates each winter (49 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 countsGlen Burnie climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 6 | 8 | 13 | 19 | 24 | 29 | 32 | 30 | 27 | 20 | 14 | 9 |
| Avg temp (°C) | 1 | 3 | 7 | 13 | 18 | 23 | 26 | 25 | 21 | 14 | 8 | 4 |
| Avg low (°C) | −4 | −3 | 1 | 6 | 12 | 17 | 20 | 19 | 15 | 8 | 3 | −1 |
| Precipitation (mm) | 78 | 74 | 102 | 86 | 98 | 101 | 114 | 104 | 113 | 100 | 80 | 94 |
| Snowfall (cm) | 16 | 19 | 7 | — | — | — | — | — | — | — | 0 | 6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 6 | 8 | 13 | 19 | 24 | 29 |
| Avg temp (°C) | 1 | 3 | 7 | 13 | 18 | 23 |
| Avg low (°C) | −4 | −3 | 1 | 6 | 12 | 17 |
| Precipitation (mm) | 78 | 74 | 102 | 86 | 98 | 101 |
| Snowfall (cm) | 16 | 19 | 7 | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 30 | 27 | 20 | 14 | 9 |
| Avg temp (°C) | 26 | 25 | 21 | 14 | 8 | 4 |
| Avg low (°C) | 20 | 19 | 15 | 8 | 3 | −1 |
| Precipitation (mm) | 114 | 104 | 113 | 100 | 80 | 94 |
| Snowfall (cm) | — | — | — | — | 0 | 6 |
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 ≥ 32°C (days) | — | — | — | 0.4 | 2 | 7 | 13 | 8 | 3 | 0.2 | — | — |
| Days with low ≤ 0°C (days) | 24 | 21 | 14 | 2 | — | — | — | — | — | 1.0 | 10 | 21 |
| Days with snowfall ≥ 2.5 cm (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 ≥ 32°C (days) | — | — | — | 0.4 | 2 | 7 |
| Days with low ≤ 0°C (days) | 24 | 21 | 14 | 2 | — | — |
| Days with snowfall ≥ 2.5 cm (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 ≥ 32°C (days) | 13 | 8 | 3 | 0.2 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 1.0 | 10 | 21 |
| Days with snowfall ≥ 2.5 cm (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 5 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.