Oyam climate — normals and trends

Q: What is the climate of Oyam?

Oyam has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.9 °C and it receives 1,939 mm of precipitation per year.

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

The hottest day measured in Oyam between 1940 and 2025 was 29 March 2007, reaching 35.8 °C.

Q: What is the coldest day in Oyam?

The coldest day measured in Oyam between 1940 and 2025 was 30 August 1950, at 13.9 °C.

Q: Does it snow in Oyam?

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

Q: Has the climate of Oyam warmed?

Yes: Oyam warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Oyam?

The wettest day measured in Oyam between 1940 and 2025 was 11 April 2024, with 187 mm of rain in 24 hours.

Q: What was the windiest day in Oyam?

The windiest day measured in Oyam between 1940 and 2025 was 15 July 1950, with winds reaching 18.0 km/h.

Q: What is the warmest month in Oyam?

The warmest month in Oyam is April (25.8 °C on average); the coldest is July (23.4 °C).

Q: How much does it rain in Oyam?

Oyam receives on average 1,939 mm of precipitation per year, spread over about 261 rainy days.

Q: Is it sunny in Oyam?

Oyam gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

Oyam (Gabon) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.9 °C and it receives 1,939 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 April (25.8 °C on average) and the coldest is July (23.4 °C). Rainfall peaks in November.

Oyam averages 0 frost days, 138 hot days (≥ 30 °C) and 261 rainy days per year.

Oyam has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.

The hottest day of the period reached 35.8 °C (on 29 March 2007) and the coldest 13.9 °C (on 30 August 1950).

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

OyamMoyen-Ogooué Province

coords: -0.20°, 10.68°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthJulyWettest monthNovemberDriest monthJuly

Mean daily temperature

24.9°C

Average daily high

29.2°C

Average daily low

22.1°C

Annual rainfall

1,939mm

Sunshine / day

8.0h

Mean relative humidity

86%

Average peak wind

8.7km/h

Seasonal range

2.4°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

138 d/yr

Rainy days (≥ 1 mm)

261 d/yr

Annual snowfall

0.0 cm

Average feels-like high

34.2 °C

Average feels-like low

26.1 °C

Average peak gust

24.3 km/h

Tropical nights (≥ 20 °C)

346 d/yr

Solar radiation

14.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.0 °C

since 1940

+0.2 °C per decade · r² = 0.84 · 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

35.8 °C

29 March 2007

Coldest day

13.9 °C

30 August 1950

Wettest day

187 mm

11 April 2024

Windiest day

18.0 km/h

15 July 1950

Strongest gust

44.3 km/h

5 December 1985

Hottest feels-like

44.0 °C

27 March 2024

Coldest feels-like

13.1 °C

8 August 1950

Sunniest day

12.0 h

14 November 1944

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.3 °C24 March 2025	18.6 °C13 August 2025	25.7 °C	1,816 mm	203
2024	35.4 °C16 March 2024	19.0 °C21 July 2024	26.3 °C	1,963 mm	233
2023	34.3 °C12 May 2023	20.1 °C22 June 2023	26.0 °C	2,149 mm	235
2022	33.9 °C1 December 2022	19.1 °C16 August 2022	25.8 °C	2,151 mm	210
2021	34.1 °C12 February 2021	21.2 °C24 June 2021	25.9 °C	2,214 mm	226
2020	34.7 °C13 March 2020	20.9 °C25 July 2020	26.2 °C	2,129 mm	216
2019	34.0 °C24 February 2019	20.6 °C12 August 2019	26.1 °C	2,252 mm	222
2018	34.5 °C27 October 2018	19.9 °C3 August 2018	25.9 °C	2,064 mm	210
2017	35.0 °C3 April 2017	20.3 °C12 August 2017	26.1 °C	2,130 mm	219
2016	34.8 °C13 April 2016	19.1 °C28 July 2016	26.2 °C	1,895 mm	234
2015	34.6 °C17 February 2015	19.7 °C31 July 2015	25.7 °C	1,706 mm	203
2014	33.9 °C15 March 2014	18.7 °C27 July 2014	25.6 °C	1,849 mm	194
2013	34.6 °C28 January 2013	19.6 °C18 August 2013	25.7 °C	1,781 mm	200
2012	33.9 °C8 May 2012	17.9 °C26 July 2012	25.6 °C	1,993 mm	211
2011	34.3 °C5 March 2011	18.2 °C26 July 2011	25.6 °C	1,888 mm	213
2010	34.0 °C30 January 2010	18.9 °C17 July 2010	25.7 °C	1,703 mm	207
2009	33.9 °C18 May 2009	19.3 °C11 July 2009	25.4 °C	1,890 mm	187
2008	34.2 °C21 April 2008	17.4 °C5 July 2008	25.4 °C	2,025 mm	200
2007	35.8 °C29 March 2007	18.7 °C29 July 2007	25.4 °C	1,959 mm	210
2006	34.7 °C10 April 2006	18.2 °C25 July 2006	25.3 °C	1,842 mm	201
2005	34.7 °C28 February 2005	19.8 °C28 June 2005	25.4 °C	1,682 mm	195
2004	34.4 °C16 February 2004	19.1 °C28 July 2004	25.4 °C	1,895 mm	189
2003	34.0 °C23 March 2003	20.2 °C20 July 2003	25.5 °C	2,062 mm	201
2002	34.9 °C23 February 2002	19.7 °C19 July 2002	25.4 °C	1,856 mm	193
2001	33.5 °C9 April 2001	17.8 °C15 August 2001	24.9 °C	1,848 mm	152
2000	33.7 °C25 February 2000	19.3 °C15 July 2000	25.0 °C	1,849 mm	143
1999	34.5 °C11 April 1999	19.1 °C30 July 1999	25.0 °C	2,198 mm	154
1998	34.6 °C1 February 1998	20.2 °C2 August 1998	25.7 °C	2,043 mm	208
1997	34.1 °C10 April 1997	17.7 °C3 July 1997	25.0 °C	1,908 mm	148
1996	32.4 °C9 March 1996	16.4 °C16 July 1996	24.7 °C	2,065 mm	124
1995	33.7 °C10 May 1995	19.0 °C6 July 1995	25.2 °C	2,022 mm	171
1994	33.5 °C28 March 1994	19.5 °C20 July 1994	24.9 °C	2,075 mm	152
1993	34.0 °C25 February 1993	20.2 °C14 June 1993	25.0 °C	1,952 mm	161
1992	34.1 °C5 March 1992	18.7 °C1 August 1992	24.7 °C	1,746 mm	134
1991	32.8 °C14 March 1991	18.3 °C7 July 1991	24.8 °C	1,787 mm	106
1990	33.3 °C14 April 1990	18.4 °C28 June 1990	24.8 °C	2,042 mm	132
1989	34.0 °C2 March 1989	16.8 °C21 July 1989	24.8 °C	2,045 mm	148
1988	33.5 °C18 April 1988	18.1 °C20 July 1988	25.1 °C	2,396 mm	139
1987	34.4 °C20 March 1987	19.6 °C1 July 1987	25.3 °C	1,902 mm	172
1986	35.3 °C10 February 1986	17.9 °C28 July 1986	24.7 °C	1,858 mm	134
1985	34.0 °C21 March 1985	19.0 °C20 July 1985	24.7 °C	1,899 mm	125
1984	34.5 °C19 March 1984	20.1 °C3 September 1984	25.0 °C	2,278 mm	147
1983	35.1 °C23 February 1983	17.6 °C18 July 1983	24.8 °C	1,699 mm	145
1982	33.7 °C23 February 1982	19.2 °C3 August 1982	24.6 °C	1,856 mm	124
1981	34.3 °C27 February 1981	17.8 °C5 August 1981	24.7 °C	1,970 mm	130
1980	34.2 °C21 March 1980	19.1 °C6 July 1980	24.7 °C	2,053 mm	118
1979	33.4 °C25 April 1979	19.0 °C8 July 1979	24.7 °C	1,949 mm	129
1978	32.9 °C16 March 1978	16.6 °C3 July 1978	24.6 °C	1,783 mm	98
1977	32.5 °C14 January 1977	17.8 °C1 July 1977	24.6 °C	2,185 mm	116
1976	32.8 °C17 March 1976	16.0 °C11 July 1976	24.0 °C	2,189 mm	87
1975	32.8 °C26 February 1975	16.9 °C27 July 1975	24.2 °C	2,250 mm	94
1974	33.4 °C3 February 1974	15.0 °C6 July 1974	24.3 °C	2,053 mm	96
1973	33.6 °C8 February 1973	17.9 °C14 July 1973	24.8 °C	2,253 mm	119
1972	32.7 °C23 February 1972	17.7 °C26 June 1972	24.5 °C	1,920 mm	120
1971	32.9 °C14 April 1971	16.0 °C21 July 1971	24.5 °C	2,139 mm	106
1970	33.5 °C11 April 1970	17.8 °C1 July 1970	24.6 °C	2,154 mm	119
1969	33.4 °C26 April 1969	18.6 °C17 June 1969	24.7 °C	1,732 mm	118
1968	32.6 °C4 April 1968	18.2 °C1 August 1968	24.4 °C	1,979 mm	71
1967	32.7 °C21 April 1967	17.1 °C25 July 1967	24.3 °C	2,338 mm	97
1966	33.2 °C13 May 1966	18.7 °C24 July 1966	24.7 °C	2,076 mm	118
1965	32.7 °C13 May 1965	18.8 °C8 July 1965	24.4 °C	1,858 mm	86
1964	32.4 °C25 April 1964	17.5 °C31 July 1964	24.4 °C	1,894 mm	108
1963	32.2 °C18 August 1963	19.3 °C14 July 1963	24.8 °C	2,126 mm	116
1962	31.9 °C14 April 1962	17.7 °C19 June 1962	24.3 °C	1,793 mm	75
1961	31.9 °C21 March 1961	16.9 °C28 July 1961	24.2 °C	2,254 mm	85
1960	32.2 °C28 January 1960	18.5 °C17 July 1960	24.4 °C	2,286 mm	90
1959	32.3 °C12 April 1959	18.5 °C25 July 1959	24.7 °C	1,646 mm	127
1958	32.6 °C12 February 1958	15.6 °C19 July 1958	24.4 °C	1,456 mm	92
1957	31.6 °C30 April 1957	17.2 °C28 June 1957	24.3 °C	1,432 mm	76
1956	32.0 °C7 January 1956	16.4 °C4 August 1956	23.9 °C	1,795 mm	40
1955	31.8 °C23 April 1955	16.2 °C24 July 1955	24.2 °C	1,842 mm	65
1954	31.5 °C13 February 1954	14.7 °C1 August 1954	24.1 °C	1,822 mm	72
1953	33.0 °C21 February 1953	16.3 °C27 June 1953	24.2 °C	1,775 mm	49
1952	32.7 °C15 March 1952	17.1 °C11 July 1952	24.4 °C	2,064 mm	113
1951	32.9 °C12 February 1951	18.2 °C21 July 1951	24.5 °C	2,073 mm	98
1950	33.9 °C4 September 1950	13.9 °C30 August 1950	24.1 °C	1,808 mm	92
1949	32.3 °C19 April 1949	18.9 °C3 July 1949	24.4 °C	1,951 mm	92
1948	31.7 °C29 January 1948	18.2 °C24 July 1948	24.0 °C	2,249 mm	44
1947	32.8 °C5 September 1947	17.0 °C13 July 1947	24.3 °C	1,802 mm	100
1946	32.6 °C25 January 1946	16.1 °C8 July 1946	24.2 °C	1,549 mm	93
1945	33.3 °C26 March 1945	17.5 °C11 July 1945	24.2 °C	1,865 mm	86
1944	32.4 °C10 September 1944	16.6 °C31 July 1944	24.5 °C	1,475 mm	127
1943	31.6 °C10 December 1943	15.2 °C6 July 1943	23.9 °C	1,568 mm	66
1942	31.7 °C28 March 1942	16.1 °C24 July 1942	24.1 °C	1,869 mm	74
1941	32.7 °C8 March 1941	16.7 °C5 August 1941	24.4 °C	1,422 mm	90
1940	31.9 °C15 April 1940	16.9 °C28 July 1940	24.2 °C	1,732 mm	81

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

30.0 °C

+0.8 °C

Hot days (≥ 30 °C)

203 d/yr

+65

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1816 mm

-123 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	31.1 °C	+1.1 °C	136 mm	-42 mm
Feb	31.7 °C	+1.3 °C	105 mm	-58 mm
Mar	31.4 °C	+0.8 °C	225 mm	-5 mm
Apr	31.2 °C	+0.6 °C	199 mm	-28 mm
May	30.9 °C	+0.9 °C	186 mm	-12 mm
Jun	29.7 °C	+1.7 °C	88 mm	+36 mm
Jul	26.9 °C	-0.1 °C	17 mm	+1 mm
Aug	27.1 °C	-0.3 °C	12 mm	-10 mm
Sep	29.6 °C	+0.9 °C	73 mm	-18 mm
Oct	29.8 °C	+0.4 °C	245 mm	+11 mm
Nov	29.9 °C	+0.5 °C	312 mm	+17 mm
Dec	30.5 °C	+1.0 °C	219 mm	-16 mm

The year's extremes

Hottest day

34.3 °C

24 Mar 2025

Coldest day

18.6 °C

13 Aug 2025

Wettest day

56.9 mm

19 Nov 2025

Windiest day

14.5 km/h

20 Mar 2025

Strongest gust

35.6 km/h

30 Sep 2025

Hottest feels-like

42.0 °C

19 Feb 2025

Coldest feels-like

20.7 °C

12 Aug 2025

Sunniest day

11.9 h

21 Nov 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 Oyam?

Oyam has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.9 °C and it receives 1,939 mm of precipitation per year.

What is the hottest day ever recorded in Oyam?

The hottest day measured in Oyam between 1940 and 2025 was 29 March 2007, reaching 35.8 °C.

What is the coldest day in Oyam?

The coldest day measured in Oyam between 1940 and 2025 was 30 August 1950, at 13.9 °C.

Does it snow in Oyam?

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

Has the climate of Oyam warmed?

Yes: Oyam warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Oyam?

The wettest day measured in Oyam between 1940 and 2025 was 11 April 2024, with 187 mm of rain in 24 hours.

What was the windiest day in Oyam?

The windiest day measured in Oyam between 1940 and 2025 was 15 July 1950, with winds reaching 18.0 km/h.

What is the warmest month in Oyam?

The warmest month in Oyam is April (25.8 °C on average); the coldest is July (23.4 °C).

How much does it rain in Oyam?

Oyam receives on average 1,939 mm of precipitation per year, spread over about 261 rainy days.

Is it sunny in Oyam?

Oyam gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.

Are there tropical nights in Oyam?

Yes: Oyam has on average 346 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Oyam?

In Oyam, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 27 March 2024, and the lowest was 13.1 °C on 8 August 1950.

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