Marlboro climate — normals and trends
Marlboro (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.6 °C and it receives 1,099 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 (24.7 °C on average) and the coldest is January (0.6 °C). Rainfall peaks in August.
Marlboro averages 72 frost days, 32 hot days (≥ 30 °C) and 119 rainy days per year.
Marlboro 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 80 to 64 per year over the period.
The hottest day of the period reached 39.8 °C (on 3 July 1966) and the coldest -23.0 °C (on 22 January 1984).
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
MarlboroNew Jersey
- coords
- 40.32°, -74.25°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.6°C
Average daily high
16.9°C
Average daily low
8.7°C
Annual rainfall
1,099mm
Sunshine / day
8.8h
Mean relative humidity
68%
Average peak wind
18.5km/h
Seasonal range
24.1°C
Frost days (< 0 °C)
72 d/yr
Hot days (≥ 30 °C)
32 d/yr
Rainy days (≥ 1 mm)
119 d/yr
Annual snowfall
52.7 cm
Average feels-like high
15.5 °C
Average feels-like low
6.2 °C
Average peak gust
39.6 km/h
Tropical nights (≥ 20 °C)
50 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.38 · 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
39.8 °C
3 July 1966
Coldest day
-23.0 °C
22 January 1984
Wettest day
141 mm
26 October 2021
Windiest day
64.7 km/h
29 October 2012
Strongest gust
152.6 km/h
29 October 2012
Hottest feels-like
44.9 °C
15 July 1995
Coldest feels-like
-28.2 °C
22 January 1984
Snowiest day
37.7 cm
23 January 2016
Sunniest day
14.1 h
6 June 1948
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 | 2.9 °C | -1.2 °C | 30 mm | -54 mm |
| Feb | 6.0 °C | +0.5 °C | 74 mm | -7 mm |
| Mar | 13.9 °C | +3.8 °C | 97 mm | -5 mm |
| Apr | 17.9 °C | +1.8 °C | 95 mm | +2 mm |
| May | 21.6 °C | +0.1 °C | 133 mm | +38 mm |
| Jun | 27.7 °C | +1.2 °C | 68 mm | -17 mm |
| Jul | 30.6 °C | +1.5 °C | 162 mm | +61 mm |
| Aug | 26.8 °C | -1.2 °C | 32 mm | -75 mm |
| Sep | 25.4 °C | +1.1 °C | 76 mm | -12 mm |
| Oct | 19.1 °C | +0.5 °C | 70 mm | -14 mm |
| Nov | 12.4 °C | -0.1 °C | 45 mm | -42 mm |
| Dec | 4.7 °C | -1.9 °C | 71 mm | -23 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 Marlboro?
Marlboro has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.6 °C and it receives 1,099 mm of precipitation per year.
What is the hottest day ever recorded in Marlboro?
The hottest day measured in Marlboro between 1940 and 2025 was 3 July 1966, reaching 39.8 °C.
What is the coldest day in Marlboro?
The coldest day measured in Marlboro between 1940 and 2025 was 22 January 1984, at -23.0 °C.
Does it snow in Marlboro?
Yes. Marlboro gets on average 52.7 cm of snow per year and has around 72 frost days.
Has the climate of Marlboro warmed?
Yes: Marlboro warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Marlboro?
The wettest day measured in Marlboro between 1940 and 2025 was 26 October 2021, with 141 mm of rain in 24 hours.
What was the windiest day in Marlboro?
The windiest day measured in Marlboro between 1940 and 2025 was 29 October 2012, with winds reaching 64.7 km/h.
What is the warmest month in Marlboro?
The warmest month in Marlboro is July (24.7 °C on average); the coldest is January (0.6 °C).
How much does it rain in Marlboro?
Marlboro receives on average 1,099 mm of precipitation per year, spread over about 119 rainy days.
Is it sunny in Marlboro?
Marlboro gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Marlboro?
The heaviest 24-hour snowfall measured in Marlboro between 1940 and 2025 was 23 January 2016, with 37.7 cm.
Are there tropical nights in Marlboro?
Yes: Marlboro has on average 50 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Marlboro?
In Marlboro, between 1940 and 2025, the highest apparent temperature reached 44.9 °C on 15 July 1995, and the lowest was -28.2 °C on 22 January 1984.
Compare Marlboro with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Marlboro