Usilampatti climate — normals and trends
Usilampatti (India) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 826 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 May (29.8 °C on average) and the coldest is December (24.2 °C). Rainfall peaks in October.
Usilampatti averages 0 frost days, 279 hot days (≥ 30 °C) and 141 rainy days per year.
Usilampatti has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.7 °C (on 10 May 1973) and the coldest 12.0 °C (on 26 December 1941).
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
UsilampattiTamil Nadu
- coords
- 9.97°, 77.79°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.1°C
Average daily high
32.7°C
Average daily low
22.5°C
Annual rainfall
826mm
Sunshine / day
10.1h
Mean relative humidity
64%
Average peak wind
9.7km/h
Seasonal range
5.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
279 d/yr
Rainy days (≥ 1 mm)
141 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.6 °C
Average feels-like low
25.4 °C
Average peak gust
28.3 km/h
Tropical nights (≥ 20 °C)
315 d/yr
Solar radiation
19.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.74 · 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
41.7 °C
10 May 1973
Coldest day
12.0 °C
26 December 1941
Wettest day
165 mm
28 October 1959
Windiest day
28.3 km/h
13 November 1992
Strongest gust
81.7 km/h
13 November 1992
Hottest feels-like
45.7 °C
2 June 2014
Coldest feels-like
11.5 °C
26 December 1941
Sunniest day
12.3 h
15 May 1950
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 | 29.2 °C | -0.5 °C | 41 mm | +20 mm |
| Feb | 32.4 °C | 0.0 °C | 7 mm | -9 mm |
| Mar | 33.1 °C | -2.0 °C | 97 mm | +74 mm |
| Apr | 35.1 °C | -1.0 °C | 62 mm | +18 mm |
| May | 34.6 °C | -1.6 °C | 95 mm | +30 mm |
| Jun | 33.9 °C | 0.0 °C | 51 mm | -7 mm |
| Jul | 33.4 °C | +0.5 °C | 113 mm | +41 mm |
| Aug | 33.4 °C | +0.2 °C | 52 mm | -17 mm |
| Sep | 34.7 °C | +1.1 °C | 54 mm | -22 mm |
| Oct | 31.8 °C | +0.3 °C | 192 mm | +33 mm |
| Nov | 29.9 °C | +0.8 °C | 165 mm | +10 mm |
| Dec | 29.2 °C | +0.6 °C | 25 mm | -44 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 Usilampatti?
Usilampatti has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 826 mm of precipitation per year.
What is the hottest day ever recorded in Usilampatti?
The hottest day measured in Usilampatti between 1940 and 2025 was 10 May 1973, reaching 41.7 °C.
What is the coldest day in Usilampatti?
The coldest day measured in Usilampatti between 1940 and 2025 was 26 December 1941, at 12.0 °C.
Does it snow in Usilampatti?
Almost never: Usilampatti sees virtually no snow, with about 0 frost days per year.
Has the climate of Usilampatti warmed?
Yes: Usilampatti warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Usilampatti?
The wettest day measured in Usilampatti between 1940 and 2025 was 28 October 1959, with 165 mm of rain in 24 hours.
What was the windiest day in Usilampatti?
The windiest day measured in Usilampatti between 1940 and 2025 was 13 November 1992, with winds reaching 28.3 km/h.
What is the warmest month in Usilampatti?
The warmest month in Usilampatti is May (29.8 °C on average); the coldest is December (24.2 °C).
How much does it rain in Usilampatti?
Usilampatti receives on average 826 mm of precipitation per year, spread over about 141 rainy days.
Is it sunny in Usilampatti?
Usilampatti gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
Are there tropical nights in Usilampatti?
Yes: Usilampatti has on average 315 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Usilampatti?
In Usilampatti, between 1940 and 2025, the highest apparent temperature reached 45.7 °C on 2 June 2014, and the lowest was 11.5 °C on 26 December 1941.
Compare Usilampatti with another city
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Nearby cities
The climate around Usilampatti