Mastic climate — normals and trends
Mastic (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.8 °C and it receives 1,105 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 (22.7 °C on average) and the coldest is January (1.3 °C). Rainfall peaks in December.
Mastic averages 50 frost days, 0 hot days (≥ 30 °C) and 115 rainy days per year.
Mastic has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 59 to 41 per year over the period.
The hottest day of the period reached 31.9 °C (on 6 July 2010) and the coldest -16.5 °C (on 14 February 2016).
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
MasticNew York
- coords
- 40.80°, -72.84°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.8°C
Average daily high
13.9°C
Average daily low
9.8°C
Annual rainfall
1,105mm
Sunshine / day
9.1h
Mean relative humidity
75%
Average peak wind
27.3km/h
Seasonal range
21.4°C
Frost days (< 0 °C)
50 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
115 d/yr
Annual snowfall
52.6 cm
Average feels-like high
11.9 °C
Average feels-like low
6.3 °C
Average peak gust
43.8 km/h
Tropical nights (≥ 20 °C)
56 d/yr
Solar radiation
15.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.33 · 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
31.9 °C
6 July 2010
Coldest day
-16.5 °C
14 February 2016
Wettest day
185 mm
14 October 2005
Windiest day
83.2 km/h
27 September 1985
Strongest gust
151.9 km/h
27 September 1985
Hottest feels-like
37.9 °C
27 August 1948
Coldest feels-like
-25.6 °C
30 December 1962
Snowiest day
32.6 cm
16 February 1958
Sunniest day
14.4 h
10 June 2016
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 | 2.6 °C | -1.3 °C | 37 mm | -59 mm |
| Feb | 4.1 °C | +0.1 °C | 83 mm | -5 mm |
| Mar | 8.6 °C | +2.1 °C | 108 mm | +1 mm |
| Apr | 11.9 °C | +1.3 °C | 83 mm | -12 mm |
| May | 16.3 °C | +0.9 °C | 147 mm | +55 mm |
| Jun | 21.8 °C | +1.0 °C | 55 mm | -18 mm |
| Jul | 26.0 °C | +1.5 °C | 73 mm | +0 mm |
| Aug | 23.5 °C | -0.8 °C | 47 mm | -43 mm |
| Sep | 21.8 °C | +0.5 °C | 65 mm | -23 mm |
| Oct | 17.1 °C | +0.6 °C | 128 mm | +35 mm |
| Nov | 11.8 °C | 0.0 °C | 57 mm | -45 mm |
| Dec | 5.6 °C | -1.3 °C | 77 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 Mastic?
Mastic has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 11.8 °C and it receives 1,105 mm of precipitation per year.
What is the hottest day ever recorded in Mastic?
The hottest day measured in Mastic between 1940 and 2025 was 6 July 2010, reaching 31.9 °C.
What is the coldest day in Mastic?
The coldest day measured in Mastic between 1940 and 2025 was 14 February 2016, at -16.5 °C.
Does it snow in Mastic?
Yes. Mastic gets on average 52.6 cm of snow per year and has around 50 frost days.
Has the climate of Mastic warmed?
Yes: Mastic warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mastic?
The wettest day measured in Mastic between 1940 and 2025 was 14 October 2005, with 185 mm of rain in 24 hours.
What was the windiest day in Mastic?
The windiest day measured in Mastic between 1940 and 2025 was 27 September 1985, with winds reaching 83.2 km/h.
What is the warmest month in Mastic?
The warmest month in Mastic is July (22.7 °C on average); the coldest is January (1.3 °C).
How much does it rain in Mastic?
Mastic receives on average 1,105 mm of precipitation per year, spread over about 115 rainy days.
Is it sunny in Mastic?
Mastic gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Mastic?
The heaviest 24-hour snowfall measured in Mastic between 1940 and 2025 was 16 February 1958, with 32.6 cm.
Are there tropical nights in Mastic?
Yes: Mastic has on average 56 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mastic?
In Mastic, between 1940 and 2025, the highest apparent temperature reached 37.9 °C on 27 August 1948, and the lowest was -25.6 °C on 30 December 1962.
Compare Mastic with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mastic