San Borja climate — normals and trends

Q: What is the climate of San Borja?

San Borja has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.0 °C and it receives 2,090 mm of precipitation per year.

Q: What is the hottest day ever recorded in San Borja?

The hottest day measured in San Borja between 1940 and 2025 was 11 October 2020, reaching 41.9 °C.

Q: What is the coldest day in San Borja?

The coldest day measured in San Borja between 1940 and 2025 was 20 July 1975, at 6.5 °C.

Q: Does it snow in San Borja?

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

Q: Has the climate of San Borja warmed?

Yes: San Borja warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in San Borja?

The wettest day measured in San Borja between 1940 and 2025 was 15 January 2004, with 272 mm of rain in 24 hours.

Q: What was the windiest day in San Borja?

The windiest day measured in San Borja between 1940 and 2025 was 24 October 2021, with winds reaching 31.4 km/h.

Q: What is the warmest month in San Borja?

The warmest month in San Borja is October (26.4 °C on average); the coldest is June (22.4 °C).

Q: How much does it rain in San Borja?

San Borja receives on average 2,090 mm of precipitation per year, spread over about 199 rainy days.

Q: Is it sunny in San Borja?

San Borja gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.

San Borja (Bolivia) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.0 °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 October (26.4 °C on average) and the coldest is June (22.4 °C). Rainfall peaks in January.

San Borja averages 0 frost days, 202 hot days (≥ 30 °C) and 199 rainy days per year.

San Borja has warmed by +1.7 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.

The hottest day of the period reached 41.9 °C (on 11 October 2020) and the coldest 6.5 °C (on 20 July 1975).

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

San BorjaBeni Department

coords: -14.85°, -66.75°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthOctoberColdest monthJuneWettest monthJanuaryDriest monthJuly

Mean daily temperature

25.0°C

Average daily high

30.0°C

Average daily low

21.2°C

Annual rainfall

2,090mm

Sunshine / day

9.2h

Mean relative humidity

81%

Average peak wind

12.4km/h

Seasonal range

4.0°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

202 d/yr

Rainy days (≥ 1 mm)

199 d/yr

Annual snowfall

0.0 cm

Average feels-like high

34.6 °C

Average feels-like low

24.0 °C

Average peak gust

33.9 km/h

Tropical nights (≥ 20 °C)

271 d/yr

Solar radiation

16.9 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.7 °C

since 1940

+0.2 °C per decade · r² = 0.44 · 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

41.9 °C

11 October 2020

Coldest day

6.5 °C

20 July 1975

Wettest day

272 mm

15 January 2004

Windiest day

31.4 km/h

24 October 2021

Strongest gust

81.4 km/h

29 December 2009

Hottest feels-like

46.9 °C

25 November 2008

Coldest feels-like

4.0 °C

19 July 1975

Sunniest day

12.9 h

24 December 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	39.5 °C26 September 2025	10.1 °C4 July 2025	25.9 °C	2,133 mm	235
2024	41.7 °C6 October 2024	10.8 °C11 August 2024	26.9 °C	1,887 mm	285
2023	41.7 °C22 October 2023	10.0 °C13 June 2023	27.3 °C	1,799 mm	293
2022	38.9 °C19 November 2022	10.0 °C13 June 2022	26.0 °C	1,799 mm	264
2021	39.9 °C1 October 2021	7.6 °C1 July 2021	25.8 °C	1,954 mm	239
2020	41.9 °C11 October 2020	11.6 °C21 August 2020	26.8 °C	1,871 mm	281
2019	40.3 °C17 September 2019	8.3 °C5 August 2019	26.0 °C	2,248 mm	252
2018	40.3 °C11 September 2018	11.3 °C27 July 2018	25.4 °C	2,374 mm	230
2017	38.3 °C17 October 2017	7.7 °C19 July 2017	25.8 °C	2,448 mm	253
2016	38.6 °C20 October 2016	12.9 °C23 August 2016	25.8 °C	1,937 mm	248
2015	39.8 °C24 September 2015	12.7 °C20 June 2015	26.3 °C	2,298 mm	245
2014	38.5 °C15 October 2014	11.9 °C24 May 2014	25.7 °C	2,407 mm	226
2013	37.9 °C6 September 2013	8.4 °C23 July 2013	25.6 °C	2,186 mm	244
2012	39.4 °C17 September 2012	9.5 °C19 July 2012	25.9 °C	2,243 mm	246
2011	38.5 °C27 September 2011	10.3 °C5 July 2011	25.8 °C	2,297 mm	252
2010	39.8 °C28 September 2010	8.2 °C17 July 2010	26.0 °C	1,648 mm	255
2009	37.6 °C4 October 2009	9.0 °C25 July 2009	25.3 °C	2,255 mm	224
2008	38.8 °C9 November 2008	10.5 °C30 May 2008	25.4 °C	2,391 mm	233
2007	38.8 °C13 September 2007	10.8 °C27 July 2007	25.2 °C	2,406 mm	224
2006	36.8 °C16 August 2006	12.2 °C25 May 2006	25.6 °C	2,270 mm	242
2005	38.8 °C24 September 2005	10.2 °C10 August 2005	25.4 °C	2,027 mm	239
2004	37.9 °C22 September 2004	11.2 °C1 August 2004	25.2 °C	2,398 mm	221
2003	37.9 °C8 November 2003	12.3 °C14 July 2003	25.5 °C	1,633 mm	245
2002	37.7 °C7 October 2002	13.3 °C26 June 2002	25.7 °C	1,744 mm	248
2001	37.3 °C26 October 2001	9.9 °C19 June 2001	25.1 °C	1,937 mm	231
2000	38.4 °C12 October 2000	9.0 °C12 July 2000	24.9 °C	1,765 mm	220
1999	38.2 °C6 September 1999	9.4 °C17 August 1999	24.9 °C	2,029 mm	199
1998	35.0 °C13 September 1998	13.0 °C19 May 1998	24.9 °C	2,040 mm	212
1997	37.3 °C8 September 1997	13.8 °C9 August 1997	25.3 °C	1,830 mm	217
1996	36.0 °C9 August 1996	9.2 °C30 June 1996	24.8 °C	1,898 mm	212
1995	38.6 °C6 November 1995	12.0 °C22 July 1995	25.2 °C	1,974 mm	232
1994	37.1 °C7 September 1994	9.1 °C27 June 1994	25.3 °C	2,105 mm	236
1993	36.3 °C9 October 1993	10.1 °C10 August 1993	24.6 °C	2,193 mm	215
1992	34.6 °C23 January 1992	10.2 °C24 July 1992	24.3 °C	2,401 mm	156
1991	36.2 °C13 October 1991	10.0 °C24 July 1991	24.9 °C	2,270 mm	216
1990	37.6 °C12 October 1990	8.4 °C21 July 1990	24.6 °C	2,162 mm	204
1989	36.1 °C25 August 1989	7.3 °C9 July 1989	24.9 °C	2,193 mm	208
1988	37.6 °C8 September 1988	8.9 °C14 July 1988	25.2 °C	2,147 mm	219
1987	39.5 °C7 October 1987	11.5 °C8 August 1987	25.1 °C	2,108 mm	228
1986	35.3 °C20 November 1986	11.6 °C3 June 1986	24.8 °C	1,962 mm	211
1985	35.7 °C6 October 1985	8.9 °C11 June 1985	24.9 °C	2,076 mm	224
1984	36.3 °C6 October 1984	10.5 °C25 August 1984	24.8 °C	1,975 mm	213
1983	36.9 °C28 September 1983	12.0 °C2 June 1983	24.7 °C	2,097 mm	209
1982	35.1 °C9 September 1982	12.0 °C20 June 1982	24.9 °C	2,329 mm	200
1981	35.5 °C10 September 1981	8.5 °C21 July 1981	24.6 °C	2,689 mm	183
1980	34.8 °C27 October 1980	11.0 °C31 July 1980	24.6 °C	2,307 mm	200
1979	36.5 °C21 October 1979	11.0 °C1 June 1979	24.5 °C	1,981 mm	205
1978	36.6 °C2 October 1978	8.5 °C16 August 1978	24.8 °C	2,659 mm	214
1977	37.1 °C11 September 1977	11.7 °C14 August 1977	24.9 °C	2,442 mm	217
1976	37.0 °C17 September 1976	9.9 °C3 July 1976	24.3 °C	2,121 mm	200
1975	36.1 °C5 September 1975	6.5 °C20 July 1975	24.4 °C	2,389 mm	205
1974	37.7 °C22 September 1974	11.1 °C26 July 1974	24.0 °C	2,421 mm	171
1973	35.8 °C11 September 1973	10.8 °C20 June 1973	24.5 °C	2,177 mm	189
1972	35.8 °C24 October 1972	11.8 °C8 July 1972	24.7 °C	1,829 mm	208
1971	35.8 °C19 September 1971	11.3 °C12 June 1971	23.8 °C	1,947 mm	162
1970	37.0 °C5 September 1970	11.6 °C3 July 1970	24.8 °C	1,904 mm	208
1969	37.8 °C2 September 1969	8.1 °C11 July 1969	25.2 °C	2,073 mm	240
1968	37.0 °C9 November 1968	12.0 °C17 May 1968	24.6 °C	1,967 mm	200
1967	36.7 °C27 September 1967	11.5 °C15 June 1967	24.9 °C	2,124 mm	217
1966	37.3 °C16 January 1966	9.7 °C2 September 1966	24.6 °C	1,633 mm	167
1965	35.2 °C7 October 1965	10.2 °C19 August 1965	24.5 °C	1,945 mm	153
1964	34.6 °C16 September 1964	12.1 °C29 July 1964	24.0 °C	2,154 mm	126
1963	39.9 °C18 October 1963	11.9 °C22 June 1963	25.6 °C	1,484 mm	191
1962	37.3 °C16 September 1962	9.9 °C8 July 1962	24.1 °C	1,899 mm	160
1961	41.7 °C17 September 1961	9.0 °C13 June 1961	26.3 °C	1,306 mm	244
1960	37.7 °C6 October 1960	10.4 °C22 May 1960	24.4 °C	2,360 mm	159
1959	36.8 °C9 September 1959	12.4 °C8 June 1959	24.5 °C	2,087 mm	156
1958	37.9 °C28 August 1958	10.4 °C21 June 1958	24.4 °C	2,457 mm	146
1957	34.6 °C18 September 1957	9.5 °C21 July 1957	24.1 °C	2,078 mm	100
1956	32.0 °C27 September 1956	14.5 °C14 May 1956	23.3 °C	2,477 mm	46
1955	38.5 °C20 September 1955	9.1 °C1 August 1955	24.1 °C	2,001 mm	115
1954	37.2 °C31 August 1954	14.6 °C19 June 1954	24.4 °C	2,116 mm	133
1953	36.1 °C7 August 1953	13.3 °C1 August 1953	24.4 °C	2,582 mm	102
1952	35.6 °C30 September 1952	12.2 °C20 June 1952	24.2 °C	2,193 mm	125
1951	34.4 °C24 September 1951	12.5 °C3 June 1951	24.2 °C	1,946 mm	114
1950	35.3 °C24 August 1950	11.4 °C4 August 1950	23.8 °C	2,411 mm	76
1949	36.3 °C4 January 1949	12.0 °C16 July 1949	24.6 °C	1,743 mm	138
1948	39.5 °C22 September 1948	13.6 °C9 August 1948	26.1 °C	1,109 mm	275
1947	36.0 °C20 August 1947	10.0 °C14 July 1947	24.5 °C	2,485 mm	175
1946	37.8 °C8 November 1946	11.3 °C21 July 1946	24.8 °C	2,061 mm	198
1945	39.5 °C29 August 1945	12.3 °C12 July 1945	25.5 °C	1,898 mm	217
1944	37.0 °C29 August 1944	13.6 °C28 June 1944	25.5 °C	2,006 mm	201
1943	35.9 °C1 January 1943	13.4 °C24 August 1943	24.6 °C	2,067 mm	195
1942	40.3 °C18 September 1942	9.2 °C20 June 1942	24.4 °C	1,886 mm	181
1941	37.1 °C9 October 1941	12.4 °C29 June 1941	24.6 °C	1,958 mm	154
1940	34.8 °C21 August 1940	15.2 °C2 August 1940	24.6 °C	2,247 mm	115

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

30.8 °C

+0.8 °C

Hot days (≥ 30 °C)

235 d/yr

+33

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2133 mm

+43 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.6 °C	+0.2 °C	400 mm	+72 mm
Feb	31.1 °C	+1.1 °C	330 mm	+31 mm
Mar	29.9 °C	-0.3 °C	374 mm	+118 mm
Apr	29.6 °C	-0.1 °C	174 mm	+26 mm
May	29.9 °C	+1.8 °C	56 mm	-36 mm
Jun	26.9 °C	-0.4 °C	46 mm	-17 mm
Jul	29.9 °C	+1.8 °C	10 mm	-38 mm
Aug	32.2 °C	+1.5 °C	34 mm	-30 mm
Sep	35.9 °C	+3.9 °C	56 mm	-52 mm
Oct	31.8 °C	0.0 °C	175 mm	-5 mm
Nov	31.8 °C	+0.7 °C	226 mm	+5 mm
Dec	30.8 °C	+0.2 °C	254 mm	-30 mm

The year's extremes

Hottest day

39.5 °C

26 Sep 2025

Coldest day

10.1 °C

4 Jul 2025

Wettest day

75.4 mm

14 Nov 2025

Windiest day

28.3 km/h

21 Sep 2025

Strongest gust

71.3 km/h

21 Dec 2025

Hottest feels-like

44.8 °C

11 Sep 2025

Coldest feels-like

7.7 °C

2 Jul 2025

Sunniest day

12.9 h

20 Dec 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 San Borja?

San Borja has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.0 °C and it receives 2,090 mm of precipitation per year.

What is the hottest day ever recorded in San Borja?

The hottest day measured in San Borja between 1940 and 2025 was 11 October 2020, reaching 41.9 °C.

What is the coldest day in San Borja?

The coldest day measured in San Borja between 1940 and 2025 was 20 July 1975, at 6.5 °C.

Does it snow in San Borja?

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

Has the climate of San Borja warmed?

Yes: San Borja warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in San Borja?

The wettest day measured in San Borja between 1940 and 2025 was 15 January 2004, with 272 mm of rain in 24 hours.

What was the windiest day in San Borja?

The windiest day measured in San Borja between 1940 and 2025 was 24 October 2021, with winds reaching 31.4 km/h.

What is the warmest month in San Borja?

The warmest month in San Borja is October (26.4 °C on average); the coldest is June (22.4 °C).

How much does it rain in San Borja?

San Borja receives on average 2,090 mm of precipitation per year, spread over about 199 rainy days.

Is it sunny in San Borja?

San Borja gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.

Are there tropical nights in San Borja?

Yes: San Borja has on average 271 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in San Borja?

In San Borja, between 1940 and 2025, the highest apparent temperature reached 46.9 °C on 25 November 2008, and the lowest was 4.0 °C on 19 July 1975.

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