Altotonga climate — normals and trends
Altotonga (Mexico) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 15.5 °C and it receives 2,090 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 (17.9 °C on average) and the coldest is January (12.1 °C). Rainfall peaks in September.
Altotonga averages 0 frost days, 0 hot days (≥ 30 °C) and 256 rainy days per year.
Altotonga has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.2 °C (on 16 April 1998) and the coldest -2.6 °C (on 13 February 1960).
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
AltotongaVeracruz
- coords
- 19.77°, -97.25°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.5°C
Average daily high
19.9°C
Average daily low
12.1°C
Annual rainfall
2,090mm
Sunshine / day
10.2h
Mean relative humidity
84%
Average peak wind
9.4km/h
Seasonal range
5.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
256 d/yr
Annual snowfall
0.2 cm
Average feels-like high
21.2 °C
Average feels-like low
11.4 °C
Average peak gust
32.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
17.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.79 · 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
32.2 °C
16 April 1998
Coldest day
-2.6 °C
13 February 1960
Wettest day
233 mm
6 October 1999
Windiest day
31.9 km/h
22 August 2007
Strongest gust
123.5 km/h
22 August 2007
Hottest feels-like
35.9 °C
9 May 2024
Coldest feels-like
-6.7 °C
13 February 1960
Snowiest day
3.9 cm
10 January 1967
Sunniest day
13.0 h
28 May 1940
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 | 17.5 °C | +1.0 °C | 66 mm | -21 mm |
| Feb | 19.6 °C | +1.7 °C | 86 mm | -10 mm |
| Mar | 22.6 °C | +2.6 °C | 73 mm | -63 mm |
| Apr | 22.4 °C | +0.7 °C | 56 mm | -126 mm |
| May | 24.5 °C | +2.1 °C | 193 mm | +10 mm |
| Jun | 22.0 °C | +0.3 °C | 367 mm | +117 mm |
| Jul | 22.8 °C | +1.6 °C | 161 mm | -50 mm |
| Aug | 23.3 °C | +1.8 °C | 185 mm | -39 mm |
| Sep | 22.7 °C | +1.9 °C | 299 mm | +5 mm |
| Oct | 21.5 °C | +1.9 °C | 284 mm | +73 mm |
| Nov | 19.9 °C | +1.7 °C | 172 mm | +44 mm |
| Dec | 18.4 °C | +1.3 °C | 122 mm | +35 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 Altotonga?
Altotonga has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 2,090 mm of precipitation per year.
What is the hottest day ever recorded in Altotonga?
The hottest day measured in Altotonga between 1940 and 2025 was 16 April 1998, reaching 32.2 °C.
What is the coldest day in Altotonga?
The coldest day measured in Altotonga between 1940 and 2025 was 13 February 1960, at -2.6 °C.
Does it snow in Altotonga?
Almost never: Altotonga sees virtually no snow, with about 0 frost days per year.
Has the climate of Altotonga warmed?
Yes: Altotonga warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Altotonga?
The wettest day measured in Altotonga between 1940 and 2025 was 6 October 1999, with 233 mm of rain in 24 hours.
What was the windiest day in Altotonga?
The windiest day measured in Altotonga between 1940 and 2025 was 22 August 2007, with winds reaching 31.9 km/h.
What is the warmest month in Altotonga?
The warmest month in Altotonga is May (17.9 °C on average); the coldest is January (12.1 °C).
How much does it rain in Altotonga?
Altotonga receives on average 2,090 mm of precipitation per year, spread over about 256 rainy days.
Is it sunny in Altotonga?
Altotonga gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
What is the biggest single-day snowfall in Altotonga?
The heaviest 24-hour snowfall measured in Altotonga between 1940 and 2025 was 10 January 1967, with 3.9 cm.
Are there tropical nights in Altotonga?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Altotonga.
What was the most extreme apparent temperature in Altotonga?
In Altotonga, between 1940 and 2025, the highest apparent temperature reached 35.9 °C on 9 May 2024, and the lowest was -6.7 °C on 13 February 1960.
Compare Altotonga with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Altotonga