Towson climate — normals and trends
Towson (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.6 °C and it receives 1,108 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (24.6 °C on average) and the coldest is January (0.4 °C). Rainfall peaks in July.
Towson averages 76 frost days, 35 hot days (≥ 30 °C) and 120 rainy days per year.
Towson has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 84 to 68 per year over the period.
The hottest day of the period reached 38.9 °C (on 22 July 2011) and the coldest -23.1 °C (on 19 January 1994).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
TowsonMaryland
- coords
- 39.40°, -76.60°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.6°C
Average daily high
17.2°C
Average daily low
8.5°C
Annual rainfall
1,108mm
Sunshine / day
8.9h
Mean relative humidity
68%
Average peak wind
16.2km/h
Seasonal range
24.2°C
Frost days (< 0 °C)
76 d/yr
Hot days (≥ 30 °C)
35 d/yr
Rainy days (≥ 1 mm)
120 d/yr
Annual snowfall
51.2 cm
Average feels-like high
16.0 °C
Average feels-like low
6.2 °C
Average peak gust
37.8 km/h
Tropical nights (≥ 20 °C)
49 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.39 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.9 °C
22 July 2011
Coldest day
-23.1 °C
19 January 1994
Wettest day
142 mm
14 September 1966
Windiest day
51.0 km/h
15 October 1954
Strongest gust
117.7 km/h
16 February 2016
Hottest feels-like
45.3 °C
15 July 1995
Coldest feels-like
-29.6 °C
19 January 1994
Snowiest day
41.5 cm
20 March 1958
Sunniest day
14.2 h
4 July 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 2.4 °C | -1.6 °C | 41 mm | -40 mm |
| Feb | 6.0 °C | +0.3 °C | 71 mm | -5 mm |
| Mar | 15.0 °C | +4.3 °C | 69 mm | -28 mm |
| Apr | 18.5 °C | +1.5 °C | 74 mm | -20 mm |
| May | 22.1 °C | -0.3 °C | 204 mm | +105 mm |
| Jun | 27.9 °C | +0.8 °C | 104 mm | +8 mm |
| Jul | 30.3 °C | +0.9 °C | 272 mm | +163 mm |
| Aug | 26.2 °C | -2.0 °C | 42 mm | -58 mm |
| Sep | 24.9 °C | +0.3 °C | 108 mm | +11 mm |
| Oct | 18.4 °C | -0.1 °C | 80 mm | -2 mm |
| Nov | 12.3 °C | +0.2 °C | 45 mm | -42 mm |
| Dec | 4.6 °C | -1.7 °C | 57 mm | -31 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Towson?
Towson has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.6 °C and it receives 1,108 mm of precipitation per year.
What is the hottest day ever recorded in Towson?
The hottest day measured in Towson between 1940 and 2025 was 22 July 2011, reaching 38.9 °C.
What is the coldest day in Towson?
The coldest day measured in Towson between 1940 and 2025 was 19 January 1994, at -23.1 °C.
Does it snow in Towson?
Yes. Towson gets on average 51.2 cm of snow per year and has around 76 frost days.
Has the climate of Towson warmed?
Yes: Towson warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Towson?
The wettest day measured in Towson between 1940 and 2025 was 14 September 1966, with 142 mm of rain in 24 hours.
What was the windiest day in Towson?
The windiest day measured in Towson between 1940 and 2025 was 15 October 1954, with winds reaching 51.0 km/h.
What is the warmest month in Towson?
The warmest month in Towson is July (24.6 °C on average); the coldest is January (0.4 °C).
How much does it rain in Towson?
Towson receives on average 1,108 mm of precipitation per year, spread over about 120 rainy days.
Is it sunny in Towson?
Towson gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
What is the biggest single-day snowfall in Towson?
The heaviest 24-hour snowfall measured in Towson between 1940 and 2025 was 20 March 1958, with 41.5 cm.
Are there tropical nights in Towson?
Yes: Towson has on average 49 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Towson?
In Towson, between 1940 and 2025, the highest apparent temperature reached 45.3 °C on 15 July 1995, and the lowest was -29.6 °C on 19 January 1994.
Compare Towson with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Towson