Guastatoya climate — normals and trends

Q: What is the climate of Guastatoya?

Guastatoya has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 19.5 °C and it receives 1,069 mm of precipitation per year.

Q: What is the hottest day ever recorded in Guastatoya?

The hottest day measured in Guastatoya between 1940 and 2025 was 4 May 2024, reaching 36.2 °C.

Q: What is the coldest day in Guastatoya?

The coldest day measured in Guastatoya between 1940 and 2025 was 9 January 1956, at 4.3 °C.

Q: Does it snow in Guastatoya?

Almost never: Guastatoya sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Guastatoya warmed?

Yes: Guastatoya warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Guastatoya?

The wettest day measured in Guastatoya between 1940 and 2025 was 24 September 1947, with 94 mm of rain in 24 hours.

Q: What was the windiest day in Guastatoya?

The windiest day measured in Guastatoya between 1940 and 2025 was 2 February 1998, with winds reaching 25.8 km/h.

Q: What is the warmest month in Guastatoya?

The warmest month in Guastatoya is May (21.4 °C on average); the coldest is January (17.4 °C).

Q: How much does it rain in Guastatoya?

Guastatoya receives on average 1,069 mm of precipitation per year, spread over about 156 rainy days.

Q: Is it sunny in Guastatoya?

Guastatoya gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Guastatoya (Guatemala) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 19.5 °C and it receives 1,069 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 (21.4 °C on average) and the coldest is January (17.4 °C). Rainfall peaks in June.

Guastatoya averages 0 frost days, 18 hot days (≥ 30 °C) and 156 rainy days per year.

Guastatoya has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.

The hottest day of the period reached 36.2 °C (on 4 May 2024) and the coldest 4.3 °C (on 9 January 1956).

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

GuastatoyaEl Progreso

coords: 14.85°, -90.07°
period: 1940–2025 · 86 yrs

CsbWarm-summer MediterraneanWarmest monthMayColdest monthJanuaryWettest monthJuneDriest monthFebruary

Mean daily temperature

19.5°C

Average daily high

25.3°C

Average daily low

15.1°C

Annual rainfall

1,069mm

Sunshine / day

10.4h

Mean relative humidity

79%

Average peak wind

11.4km/h

Seasonal range

4.0°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

18 d/yr

Rainy days (≥ 1 mm)

156 d/yr

Annual snowfall

0.0 cm

Average feels-like high

26.6 °C

Average feels-like low

16.0 °C

Average peak gust

35.4 km/h

Tropical nights (≥ 20 °C)

0 d/yr

Solar radiation

19.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.2 °C

since 1940

+0.3 °C per decade · r² = 0.74 · p = < 0.001

19402025

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

36.2 °C

4 May 2024

Coldest day

4.3 °C

9 January 1956

Wettest day

94 mm

24 September 1947

Windiest day

25.8 km/h

2 February 1998

Strongest gust

78.5 km/h

16 March 1983

Hottest feels-like

37.2 °C

30 April 2017

Coldest feels-like

2.1 °C

27 December 1989

Sunniest day

12.3 h

7 July 2014

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	33.6 °C13 March 2025	11.1 °C14 April 2025	21.1 °C	939 mm	52
2024	36.2 °C4 May 2024	8.7 °C8 February 2024	21.6 °C	1,197 mm	101
2023	33.5 °C14 April 2023	8.3 °C19 December 2023	21.4 °C	834 mm	69
2022	34.0 °C6 April 2022	10.0 °C31 January 2022	20.7 °C	1,343 mm	54
2021	32.5 °C12 April 2021	8.9 °C4 February 2021	21.0 °C	856 mm	43
2020	34.7 °C10 April 2020	10.7 °C27 December 2020	21.0 °C	1,373 mm	70
2019	32.9 °C14 April 2019	10.5 °C22 January 2019	21.0 °C	922 mm	52
2018	32.9 °C19 March 2018	8.2 °C10 January 2018	20.4 °C	899 mm	28
2017	34.5 °C27 April 2017	7.9 °C11 December 2017	20.5 °C	1,209 mm	34
2016	34.1 °C16 April 2016	7.7 °C11 February 2016	20.9 °C	807 mm	65
2015	33.2 °C28 April 2015	8.9 °C30 January 2015	20.6 °C	761 mm	19
2014	33.0 °C30 April 2014	6.7 °C17 January 2014	20.2 °C	1,073 mm	23
2013	33.7 °C18 March 2013	7.2 °C4 March 2013	20.4 °C	1,094 mm	42
2012	32.3 °C4 April 2012	7.8 °C24 December 2012	20.2 °C	949 mm	27
2011	32.3 °C29 March 2011	8.2 °C22 March 2011	20.2 °C	1,337 mm	16
2010	35.5 °C12 March 2010	7.7 °C17 December 2010	20.2 °C	1,443 mm	40
2009	33.9 °C4 April 2009	7.7 °C4 March 2009	20.1 °C	935 mm	23
2008	32.3 °C9 April 2008	9.1 °C4 January 2008	19.6 °C	1,335 mm	30
2007	32.7 °C12 April 2007	9.1 °C27 December 2007	19.8 °C	1,055 mm	30
2006	31.2 °C21 March 2006	6.7 °C23 November 2006	19.7 °C	1,176 mm	11
2005	31.4 °C17 March 2005	7.6 °C22 January 2005	19.9 °C	1,532 mm	18
2004	31.4 °C9 April 2004	8.3 °C10 November 2004	19.6 °C	837 mm	5
2003	35.4 °C2 May 2003	7.5 °C1 April 2003	20.2 °C	902 mm	46
2002	31.4 °C2 March 2002	5.3 °C10 January 2002	19.9 °C	717 mm	10
2001	31.3 °C12 March 2001	6.8 °C24 January 2001	19.2 °C	873 mm	10
2000	30.9 °C30 March 2000	7.9 °C28 January 2000	19.0 °C	1,101 mm	2
1999	31.8 °C14 April 1999	5.8 °C29 December 1999	19.1 °C	1,357 mm	7
1998	33.9 °C6 April 1998	8.6 °C4 February 1998	20.4 °C	1,343 mm	44
1997	31.4 °C14 March 1997	6.9 °C16 December 1997	20.1 °C	955 mm	11
1996	30.7 °C4 April 1996	5.2 °C15 January 1996	19.3 °C	1,204 mm	2
1995	31.3 °C12 February 1995	8.4 °C9 February 1995	19.9 °C	1,452 mm	6
1994	31.3 °C6 April 1994	9.8 °C15 February 1994	19.7 °C	861 mm	6
1993	32.5 °C4 April 1993	7.4 °C28 January 1993	19.7 °C	1,083 mm	22
1992	32.8 °C20 April 1992	10.1 °C9 February 1992	19.7 °C	845 mm	14
1991	32.7 °C16 March 1991	7.7 °C5 March 1991	19.7 °C	796 mm	22
1990	30.6 °C3 April 1990	9.1 °C25 January 1990	19.4 °C	978 mm	4
1989	31.1 °C9 April 1989	4.4 °C27 December 1989	19.1 °C	1,198 mm	5
1988	32.2 °C24 April 1988	8.4 °C27 January 1988	19.7 °C	1,202 mm	31
1987	33.4 °C25 March 1987	6.7 °C30 January 1987	19.8 °C	751 mm	18
1986	32.7 °C13 April 1986	5.3 °C29 January 1986	19.2 °C	771 mm	11
1985	30.8 °C27 April 1985	8.6 °C26 January 1985	19.2 °C	1,067 mm	4
1984	31.6 °C12 April 1984	7.7 °C1 March 1984	19.1 °C	1,248 mm	14
1983	31.6 °C23 April 1983	7.4 °C14 January 1983	19.9 °C	1,106 mm	10
1982	32.0 °C28 April 1982	8.6 °C19 December 1982	19.6 °C	1,057 mm	14
1981	30.8 °C30 March 1981	6.8 °C1 January 1981	19.3 °C	1,222 mm	8
1980	32.2 °C28 March 1980	9.0 °C29 December 1980	19.7 °C	977 mm	15
1979	32.0 °C12 April 1979	8.2 °C21 December 1979	19.6 °C	1,250 mm	2
1978	32.8 °C20 April 1978	7.2 °C7 February 1978	19.6 °C	1,054 mm	34
1977	31.1 °C28 March 1977	7.5 °C20 January 1977	19.4 °C	1,039 mm	9
1976	30.5 °C31 March 1976	6.7 °C19 January 1976	18.8 °C	1,109 mm	2
1975	32.4 °C11 April 1975	8.5 °C15 January 1975	19.3 °C	1,076 mm	20
1974	32.1 °C21 March 1974	9.3 °C6 December 1974	19.1 °C	1,050 mm	11
1973	33.2 °C31 March 1973	6.9 °C11 December 1973	19.8 °C	1,162 mm	31
1972	32.1 °C31 March 1972	7.0 °C22 February 1972	19.8 °C	699 mm	12
1971	33.2 °C27 April 1971	8.3 °C15 February 1971	19.1 °C	921 mm	12
1970	31.1 °C27 April 1970	6.3 °C5 February 1970	19.1 °C	1,103 mm	17
1969	32.9 °C3 May 1969	8.6 °C3 February 1969	19.6 °C	1,406 mm	23
1968	31.2 °C4 May 1968	7.7 °C9 February 1968	18.7 °C	1,248 mm	3
1967	29.5 °C31 May 1967	7.3 °C17 March 1967	18.8 °C	933 mm	0
1966	31.6 °C4 April 1966	6.8 °C28 January 1966	18.9 °C	1,127 mm	5
1965	32.2 °C18 March 1965	7.6 °C19 January 1965	19.1 °C	933 mm	17
1964	33.1 °C5 May 1964	8.8 °C2 January 1964	19.2 °C	967 mm	17
1963	31.4 °C30 April 1963	5.3 °C26 December 1963	19.2 °C	755 mm	8
1962	31.1 °C31 March 1962	7.5 °C15 February 1962	18.7 °C	1,097 mm	7
1961	33.0 °C15 April 1961	8.9 °C27 December 1961	18.8 °C	962 mm	10
1960	32.6 °C1 May 1960	7.4 °C4 December 1960	18.7 °C	1,241 mm	11
1959	30.9 °C20 April 1959	7.9 °C30 November 1959	18.9 °C	1,000 mm	8
1958	32.8 °C6 April 1958	6.4 °C6 February 1958	19.3 °C	1,241 mm	23
1957	30.3 °C22 March 1957	7.4 °C12 December 1957	18.8 °C	970 mm	5
1956	30.8 °C10 April 1956	4.3 °C9 January 1956	18.1 °C	1,141 mm	4
1955	32.8 °C26 April 1955	8.5 °C21 January 1955	18.7 °C	1,125 mm	8
1954	30.2 °C13 March 1954	7.3 °C22 December 1954	18.4 °C	1,650 mm	1
1953	31.8 °C15 April 1953	6.2 °C12 January 1953	19.2 °C	1,209 mm	12
1952	32.3 °C11 March 1952	8.0 °C28 February 1952	19.1 °C	1,224 mm	16
1951	31.5 °C8 May 1951	6.3 °C12 January 1951	19.0 °C	1,018 mm	6
1950	29.6 °C30 April 1950	6.5 °C28 November 1950	18.1 °C	1,209 mm	0
1949	30.4 °C18 April 1949	7.8 °C19 November 1949	18.6 °C	1,073 mm	5
1948	31.0 °C1 April 1948	8.0 °C16 January 1948	18.8 °C	1,349 mm	3
1947	31.8 °C25 April 1947	9.2 °C2 December 1947	19.2 °C	1,141 mm	9
1946	30.4 °C30 March 1946	9.8 °C10 March 1946	18.8 °C	679 mm	1
1945	31.6 °C25 April 1945	6.2 °C6 December 1945	18.6 °C	1,298 mm	4
1944	31.6 °C17 April 1944	6.8 °C19 January 1944	18.5 °C	1,099 mm	14
1943	30.4 °C12 April 1943	5.2 °C22 December 1943	18.2 °C	870 mm	2
1942	31.5 °C27 March 1942	8.1 °C27 January 1942	18.8 °C	952 mm	4
1941	31.7 °C20 April 1941	7.1 °C20 January 1941	18.8 °C	748 mm	13
1940	30.7 °C1 May 1940	6.6 °C26 December 1940	19.0 °C	810 mm	4

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?

Year

Across the whole year

Average daily high

27.3 °C

+2.0 °C

Hot days (≥ 30 °C)

52 d/yr

+34

Frost days (< 0 °C)

0 d/yr

Annual rainfall

939 mm

-130 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	25.5 °C	+1.9 °C	6 mm	-2 mm
Feb	27.1 °C	+1.9 °C	10 mm	+2 mm
Mar	29.9 °C	+2.8 °C	5 mm	-10 mm
Apr	28.6 °C	+0.5 °C	25 mm	-14 mm
May	29.8 °C	+2.5 °C	76 mm	-58 mm
Jun	26.8 °C	+1.1 °C	311 mm	+92 mm
Jul	27.0 °C	+2.0 °C	65 mm	-59 mm
Aug	28.6 °C	+3.1 °C	76 mm	-56 mm
Sep	27.9 °C	+2.6 °C	186 mm	-27 mm
Oct	26.2 °C	+1.9 °C	136 mm	+4 mm
Nov	25.1 °C	+1.6 °C	24 mm	-10 mm
Dec	25.3 °C	+2.1 °C	20 mm	+8 mm

The year's extremes

Hottest day

33.6 °C

13 Mar 2025

Coldest day

11.1 °C

14 Apr 2025

Wettest day

34.3 mm

27 Jun 2025

Windiest day

19.2 km/h

2 Feb 2025

Strongest gust

56.9 km/h

2 Feb 2025

Hottest feels-like

34.7 °C

2 Jun 2025

Coldest feels-like

10.6 °C

14 Apr 2025

Sunniest day

12.2 h

16 Jul 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Guastatoya?

Guastatoya has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 19.5 °C and it receives 1,069 mm of precipitation per year.

What is the hottest day ever recorded in Guastatoya?

The hottest day measured in Guastatoya between 1940 and 2025 was 4 May 2024, reaching 36.2 °C.

What is the coldest day in Guastatoya?

The coldest day measured in Guastatoya between 1940 and 2025 was 9 January 1956, at 4.3 °C.

Does it snow in Guastatoya?

Almost never: Guastatoya sees virtually no snow, with about 0 frost days per year.

Has the climate of Guastatoya warmed?

Yes: Guastatoya warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Guastatoya?

The wettest day measured in Guastatoya between 1940 and 2025 was 24 September 1947, with 94 mm of rain in 24 hours.

What was the windiest day in Guastatoya?

The windiest day measured in Guastatoya between 1940 and 2025 was 2 February 1998, with winds reaching 25.8 km/h.

What is the warmest month in Guastatoya?

The warmest month in Guastatoya is May (21.4 °C on average); the coldest is January (17.4 °C).

How much does it rain in Guastatoya?

Guastatoya receives on average 1,069 mm of precipitation per year, spread over about 156 rainy days.

Is it sunny in Guastatoya?

Guastatoya gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.

Are there tropical nights in Guastatoya?

Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Guastatoya.

What was the most extreme apparent temperature in Guastatoya?

In Guastatoya, between 1940 and 2025, the highest apparent temperature reached 37.2 °C on 30 April 2017, and the lowest was 2.1 °C on 27 December 1989.

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