Ayyalur climate — normals and trends
Ayyalur (India) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.5 °C and it receives 918 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 (30.6 °C on average) and the coldest is December (23.9 °C). Rainfall peaks in October.
Ayyalur averages 0 frost days, 277 hot days (≥ 30 °C) and 131 rainy days per year.
Ayyalur has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 42.6 °C (on 11 May 1993) and the coldest 14.1 °C (on 27 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
AyyalurTamil Nadu
- coords
- 10.48°, 78.16°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.5°C
Average daily high
32.9°C
Average daily low
23.2°C
Annual rainfall
918mm
Sunshine / day
10.3h
Mean relative humidity
66%
Average peak wind
14.5km/h
Seasonal range
6.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
277 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.5 °C
Average feels-like low
26.2 °C
Average peak gust
34.7 km/h
Tropical nights (≥ 20 °C)
320 d/yr
Solar radiation
19.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.62 · 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
42.6 °C
11 May 1993
Coldest day
14.1 °C
27 December 1941
Wettest day
209 mm
22 December 1983
Windiest day
35.5 km/h
8 June 1953
Strongest gust
81.4 km/h
23 July 1989
Hottest feels-like
46.3 °C
4 May 2024
Coldest feels-like
14.3 °C
20 January 1990
Sunniest day
12.4 h
21 May 1945
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 | 28.6 °C | -0.5 °C | 38 mm | +17 mm |
| Feb | 32.0 °C | -0.1 °C | 5 mm | -12 mm |
| Mar | 33.5 °C | -1.7 °C | 59 mm | +34 mm |
| Apr | 35.5 °C | -1.3 °C | 61 mm | +13 mm |
| May | 34.9 °C | -2.0 °C | 102 mm | +29 mm |
| Jun | 34.6 °C | -0.1 °C | 38 mm | -22 mm |
| Jul | 34.5 °C | +0.8 °C | 47 mm | -11 mm |
| Aug | 34.5 °C | +0.6 °C | 59 mm | -5 mm |
| Sep | 34.8 °C | +0.8 °C | 66 mm | -37 mm |
| Oct | 31.8 °C | +0.3 °C | 265 mm | +69 mm |
| Nov | 29.3 °C | +0.4 °C | 198 mm | +29 mm |
| Dec | 28.1 °C | +0.1 °C | 34 mm | -51 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 Ayyalur?
Ayyalur has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.5 °C and it receives 918 mm of precipitation per year.
What is the hottest day ever recorded in Ayyalur?
The hottest day measured in Ayyalur between 1940 and 2025 was 11 May 1993, reaching 42.6 °C.
What is the coldest day in Ayyalur?
The coldest day measured in Ayyalur between 1940 and 2025 was 27 December 1941, at 14.1 °C.
Does it snow in Ayyalur?
Almost never: Ayyalur sees virtually no snow, with about 0 frost days per year.
Has the climate of Ayyalur warmed?
Yes: Ayyalur warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ayyalur?
The wettest day measured in Ayyalur between 1940 and 2025 was 22 December 1983, with 209 mm of rain in 24 hours.
What was the windiest day in Ayyalur?
The windiest day measured in Ayyalur between 1940 and 2025 was 8 June 1953, with winds reaching 35.5 km/h.
What is the warmest month in Ayyalur?
The warmest month in Ayyalur is May (30.6 °C on average); the coldest is December (23.9 °C).
How much does it rain in Ayyalur?
Ayyalur receives on average 918 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Ayyalur?
Ayyalur gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Ayyalur?
Yes: Ayyalur has on average 320 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ayyalur?
In Ayyalur, between 1940 and 2025, the highest apparent temperature reached 46.3 °C on 4 May 2024, and the lowest was 14.3 °C on 20 January 1990.
Compare Ayyalur with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ayyalur