Fresnillo climate — normals and trends
Fresnillo (Mexico) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 16.7 °C and it receives 421 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 June (21.0 °C on average) and the coldest is January (11.4 °C). Rainfall peaks in September.
Fresnillo averages 4 frost days, 18 hot days (≥ 30 °C) and 64 rainy days per year.
Fresnillo has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 5 to 3 per year over the period.
The hottest day of the period reached 35.3 °C (on 15 June 2023) and the coldest -8.1 °C (on 13 December 1997).
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
FresnilloZacatecas
- coords
- 23.17°, -102.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.7°C
Average daily high
24.0°C
Average daily low
10.0°C
Annual rainfall
421mm
Sunshine / day
11.1h
Mean relative humidity
49%
Average peak wind
19.1km/h
Seasonal range
9.6°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
18 d/yr
Rainy days (≥ 1 mm)
64 d/yr
Annual snowfall
0.5 cm
Average feels-like high
21.7 °C
Average feels-like low
7.7 °C
Average peak gust
36.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
22.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.45 · 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
35.3 °C
15 June 2023
Coldest day
-8.1 °C
13 December 1997
Wettest day
57 mm
1 July 2010
Windiest day
58.5 km/h
29 December 1969
Strongest gust
103.0 km/h
4 March 1983
Hottest feels-like
35.5 °C
9 June 1989
Coldest feels-like
-14.5 °C
13 December 1997
Snowiest day
10.4 cm
9 January 1967
Sunniest day
13.4 h
23 June 1972
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 | 21.2 °C | +1.9 °C | 8 mm | -5 mm |
| Feb | 25.4 °C | +4.1 °C | 0 mm | -9 mm |
| Mar | 27.0 °C | +2.9 °C | 0 mm | -6 mm |
| Apr | 28.3 °C | +1.7 °C | 3 mm | -7 mm |
| May | 30.4 °C | +2.1 °C | 51 mm | +28 mm |
| Jun | 27.6 °C | 0.0 °C | 41 mm | -22 mm |
| Jul | 24.9 °C | -0.9 °C | 155 mm | +75 mm |
| Aug | 26.1 °C | +0.5 °C | 96 mm | +16 mm |
| Sep | 24.7 °C | +0.6 °C | 154 mm | +73 mm |
| Oct | 25.5 °C | +2.2 °C | 12 mm | -21 mm |
| Nov | 24.4 °C | +2.5 °C | 2 mm | -8 mm |
| Dec | 21.8 °C | +2.0 °C | 10 mm | -1 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 Fresnillo?
Fresnillo has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 16.7 °C and it receives 421 mm of precipitation per year.
What is the hottest day ever recorded in Fresnillo?
The hottest day measured in Fresnillo between 1940 and 2025 was 15 June 2023, reaching 35.3 °C.
What is the coldest day in Fresnillo?
The coldest day measured in Fresnillo between 1940 and 2025 was 13 December 1997, at -8.1 °C.
Does it snow in Fresnillo?
Almost never: Fresnillo sees virtually no snow, with about 4 frost days per year.
Has the climate of Fresnillo warmed?
Yes: Fresnillo warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Fresnillo?
The wettest day measured in Fresnillo between 1940 and 2025 was 1 July 2010, with 57 mm of rain in 24 hours.
What was the windiest day in Fresnillo?
The windiest day measured in Fresnillo between 1940 and 2025 was 29 December 1969, with winds reaching 58.5 km/h.
What is the warmest month in Fresnillo?
The warmest month in Fresnillo is June (21.0 °C on average); the coldest is January (11.4 °C).
How much does it rain in Fresnillo?
Fresnillo receives on average 421 mm of precipitation per year, spread over about 64 rainy days.
Is it sunny in Fresnillo?
Fresnillo gets on average 11.1 hours of sunshine per day, roughly 4,052 hours per year over 1940-2025.
What is the biggest single-day snowfall in Fresnillo?
The heaviest 24-hour snowfall measured in Fresnillo between 1940 and 2025 was 9 January 1967, with 10.4 cm.
Are there tropical nights in Fresnillo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Fresnillo.
What was the most extreme apparent temperature in Fresnillo?
In Fresnillo, between 1940 and 2025, the highest apparent temperature reached 35.5 °C on 9 June 1989, and the lowest was -14.5 °C on 13 December 1997.
Compare Fresnillo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Fresnillo