Boulsa climate — normals and trends

Q: What is the climate of Boulsa?

Boulsa has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 28.2 °C and it receives 489 mm of precipitation per year.

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

The hottest day measured in Boulsa between 1940 and 2025 was 2 April 2024, reaching 43.7 °C.

Q: What is the coldest day in Boulsa?

The coldest day measured in Boulsa between 1940 and 2025 was 13 January 1957, at 10.0 °C.

Q: Does it snow in Boulsa?

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

Q: Has the climate of Boulsa warmed?

Yes: Boulsa warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Boulsa?

The wettest day measured in Boulsa between 1940 and 2025 was 20 August 1944, with 152 mm of rain in 24 hours.

Q: What was the windiest day in Boulsa?

The windiest day measured in Boulsa between 1940 and 2025 was 27 May 1946, with winds reaching 27.4 km/h.

Q: What is the warmest month in Boulsa?

The warmest month in Boulsa is April (32.7 °C on average); the coldest is January (24.1 °C).

Q: How much does it rain in Boulsa?

Boulsa receives on average 489 mm of precipitation per year, spread over about 78 rainy days.

Q: Is it sunny in Boulsa?

Boulsa gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.

Boulsa (Burkina Faso) has a hot semi-arid climate (BSh) under the Köppen-Geiger classification. Its mean annual temperature is 28.2 °C and it receives 489 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 (32.7 °C on average) and the coldest is January (24.1 °C). Rainfall peaks in August.

Boulsa averages 0 frost days, 326 hot days (≥ 30 °C) and 78 rainy days per year.

Boulsa 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 43.7 °C (on 2 April 2024) and the coldest 10.0 °C (on 13 January 1957).

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

BoulsaCentre-Nord Region

coords: 12.67°, -0.57°
period: 1940–2025 · 86 yrs

BShHot semi-aridWarmest monthAprilColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

28.2°C

Average daily high

34.4°C

Average daily low

22.6°C

Annual rainfall

489mm

Sunshine / day

11.0h

Mean relative humidity

45%

Average peak wind

13.9km/h

Seasonal range

8.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

326 d/yr

Rainy days (≥ 1 mm)

78 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.0 °C

Average feels-like low

22.7 °C

Average peak gust

32.2 km/h

Tropical nights (≥ 20 °C)

275 d/yr

Solar radiation

22.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.3 °C

since 1940

+0.3 °C per decade · r² = 0.71 · 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

43.7 °C

2 April 2024

Coldest day

10.0 °C

13 January 1957

Wettest day

152 mm

20 August 1944

Windiest day

27.4 km/h

27 May 1946

Strongest gust

62.3 km/h

4 September 2002

Hottest feels-like

47.4 °C

6 May 2019

Coldest feels-like

5.8 °C

13 January 1957

Sunniest day

12.1 h

25 July 1963

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	43.3 °C25 April 2025	17.2 °C11 January 2025	29.7 °C	390 mm	340
2024	43.7 °C2 April 2024	15.5 °C20 December 2024	29.5 °C	503 mm	340
2023	42.2 °C9 May 2023	15.2 °C14 January 2023	29.7 °C	386 mm	351
2022	42.4 °C7 April 2022	15.3 °C2 February 2022	28.8 °C	520 mm	332
2021	43.2 °C8 April 2021	16.1 °C24 January 2021	29.7 °C	323 mm	346
2020	43.5 °C6 April 2020	14.2 °C4 January 2020	29.2 °C	470 mm	336
2019	42.4 °C6 May 2019	15.4 °C25 December 2019	29.2 °C	408 mm	341
2018	42.3 °C9 May 2018	13.4 °C14 January 2018	29.0 °C	471 mm	343
2017	42.4 °C26 March 2017	14.7 °C15 January 2017	28.8 °C	499 mm	330
2016	43.5 °C16 April 2016	15.6 °C16 January 2016	29.1 °C	454 mm	333
2015	42.8 °C7 May 2015	13.6 °C14 January 2015	29.0 °C	498 mm	325
2014	42.2 °C17 April 2014	14.3 °C27 December 2014	29.1 °C	339 mm	337
2013	42.8 °C21 March 2013	13.4 °C6 January 2013	28.9 °C	460 mm	331
2012	42.8 °C22 April 2012	12.6 °C17 January 2012	28.9 °C	598 mm	339
2011	42.5 °C17 April 2011	14.6 °C31 December 2011	29.3 °C	385 mm	342
2010	43.5 °C19 April 2010	13.6 °C12 December 2010	29.4 °C	389 mm	342
2009	41.9 °C24 March 2009	14.1 °C25 January 2009	29.1 °C	440 mm	345
2008	42.5 °C28 May 2008	12.0 °C24 January 2008	28.4 °C	391 mm	328
2007	41.7 °C21 March 2007	14.6 °C15 January 2007	28.9 °C	345 mm	327
2006	41.6 °C10 April 2006	14.4 °C9 December 2006	29.0 °C	337 mm	340
2005	41.4 °C29 March 2005	14.2 °C15 January 2005	29.0 °C	407 mm	324
2004	40.9 °C28 March 2004	14.2 °C30 January 2004	28.8 °C	260 mm	330
2003	42.1 °C19 May 2003	13.6 °C29 December 2003	28.6 °C	567 mm	322
2002	42.7 °C10 May 2002	13.2 °C27 December 2002	28.7 °C	379 mm	312
2001	42.5 °C10 May 2001	14.4 °C13 January 2001	28.7 °C	437 mm	343
2000	42.3 °C9 April 2000	14.2 °C4 February 2000	28.2 °C	495 mm	319
1999	42.4 °C23 April 1999	13.8 °C30 December 1999	28.4 °C	468 mm	315
1998	41.8 °C14 April 1998	14.1 °C19 January 1998	28.4 °C	517 mm	307
1997	40.6 °C26 April 1997	13.7 °C15 December 1997	28.3 °C	458 mm	341
1996	41.2 °C6 April 1996	14.5 °C13 January 1996	28.8 °C	381 mm	353
1995	42.0 °C30 April 1995	12.6 °C11 January 1995	28.3 °C	394 mm	318
1994	42.3 °C16 April 1994	12.6 °C17 January 1994	27.8 °C	636 mm	301
1993	41.8 °C9 May 1993	13.0 °C27 January 1993	28.6 °C	360 mm	323
1992	41.4 °C1 April 1992	14.1 °C16 January 1992	27.8 °C	551 mm	318
1991	42.6 °C23 April 1991	13.0 °C25 December 1991	28.0 °C	438 mm	316
1990	40.9 °C3 May 1990	14.0 °C10 February 1990	28.4 °C	395 mm	322
1989	41.9 °C6 May 1989	11.5 °C3 January 1989	27.9 °C	579 mm	318
1988	43.6 °C12 April 1988	11.8 °C11 February 1988	28.3 °C	552 mm	309
1987	42.6 °C7 May 1987	14.7 °C10 January 1987	29.0 °C	341 mm	340
1986	42.9 °C16 April 1986	13.3 °C11 January 1986	28.4 °C	491 mm	319
1985	42.0 °C30 April 1985	12.5 °C17 December 1985	28.4 °C	403 mm	309
1984	42.3 °C7 April 1984	12.4 °C23 December 1984	28.5 °C	392 mm	324
1983	43.1 °C6 April 1983	13.5 °C30 January 1983	28.5 °C	339 mm	324
1982	42.1 °C8 April 1982	11.2 °C10 January 1982	28.0 °C	414 mm	325
1981	41.7 °C8 April 1981	13.8 °C7 January 1981	28.2 °C	519 mm	337
1980	42.7 °C23 April 1980	11.8 °C28 December 1980	28.8 °C	480 mm	337
1979	41.7 °C6 May 1979	13.7 °C13 December 1979	28.0 °C	523 mm	330
1978	41.4 °C31 March 1978	14.5 °C13 January 1978	28.1 °C	666 mm	345
1977	41.5 °C13 April 1977	11.1 °C28 December 1977	27.8 °C	455 mm	333
1976	41.5 °C27 April 1976	13.1 °C12 January 1976	27.2 °C	539 mm	320
1975	41.5 °C30 March 1975	11.6 °C22 January 1975	27.4 °C	534 mm	302
1974	40.8 °C24 April 1974	12.6 °C7 December 1974	27.5 °C	486 mm	288
1973	42.9 °C29 April 1973	13.7 °C2 December 1973	28.7 °C	426 mm	339
1972	41.3 °C21 March 1972	13.7 °C8 January 1972	28.5 °C	583 mm	354
1971	42.1 °C26 May 1971	12.1 °C17 January 1971	28.2 °C	511 mm	331
1970	42.0 °C5 May 1970	12.7 °C6 December 1970	28.4 °C	544 mm	338
1969	43.1 °C6 April 1969	12.9 °C26 November 1969	28.3 °C	584 mm	338
1968	41.4 °C17 April 1968	12.0 °C19 January 1968	27.7 °C	638 mm	336
1967	41.3 °C5 April 1967	13.6 °C27 January 1967	27.8 °C	551 mm	305
1966	41.7 °C16 May 1966	12.7 °C3 January 1966	27.9 °C	577 mm	343
1965	41.4 °C29 April 1965	13.7 °C21 December 1965	27.3 °C	522 mm	332
1964	41.4 °C14 March 1964	15.2 °C11 January 1964	27.7 °C	540 mm	317
1963	41.8 °C2 April 1963	13.3 °C10 January 1963	28.0 °C	460 mm	344
1962	41.2 °C27 April 1962	12.3 °C18 January 1962	27.5 °C	585 mm	325
1961	42.4 °C27 April 1961	13.0 °C8 February 1961	27.5 °C	399 mm	337
1960	41.7 °C21 April 1960	12.7 °C28 December 1960	27.6 °C	380 mm	318
1959	41.6 °C13 April 1959	12.9 °C31 December 1959	27.6 °C	455 mm	316
1958	41.2 °C26 March 1958	13.5 °C30 December 1958	28.0 °C	629 mm	317
1957	40.0 °C16 April 1957	10.0 °C13 January 1957	26.6 °C	599 mm	301
1956	41.5 °C16 May 1956	11.1 °C1 January 1956	27.2 °C	755 mm	290
1955	41.3 °C19 April 1955	12.4 °C22 January 1955	27.0 °C	502 mm	310
1954	41.3 °C19 May 1954	11.8 °C1 January 1954	27.3 °C	552 mm	315
1953	41.7 °C27 April 1953	12.4 °C31 December 1953	27.6 °C	450 mm	323
1952	41.2 °C29 April 1952	11.5 °C3 February 1952	27.1 °C	623 mm	311
1951	41.0 °C16 April 1951	12.8 °C12 December 1951	26.9 °C	761 mm	340
1950	41.1 °C31 March 1950	13.0 °C8 February 1950	26.7 °C	614 mm	295
1949	41.5 °C10 May 1949	14.7 °C12 December 1949	28.0 °C	452 mm	340
1948	39.7 °C3 June 1948	11.6 °C17 January 1948	26.6 °C	535 mm	308
1947	40.5 °C30 April 1947	12.3 °C21 January 1947	26.6 °C	831 mm	278
1946	41.4 °C8 May 1946	12.1 °C1 January 1946	27.2 °C	484 mm	324
1945	40.2 °C29 April 1945	12.6 °C31 December 1945	26.6 °C	503 mm	297
1944	41.7 °C23 May 1944	14.5 °C16 December 1944	27.1 °C	849 mm	302
1943	40.9 °C9 May 1943	12.4 °C24 December 1943	26.7 °C	528 mm	281
1942	41.7 °C27 May 1942	12.2 °C27 January 1942	27.6 °C	476 mm	326
1941	41.7 °C27 March 1941	13.0 °C2 January 1941	28.6 °C	342 mm	352
1940	40.7 °C9 April 1940	12.8 °C28 January 1940	28.2 °C	352 mm	361

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

35.8 °C

+1.4 °C

Hot days (≥ 30 °C)

340 d/yr

+14

Frost days (< 0 °C)

0 d/yr

Annual rainfall

390 mm

-99 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	33.6 °C	+1.9 °C	0 mm	-0 mm
Feb	36.3 °C	+1.7 °C	0 mm	-1 mm
Mar	41.4 °C	+3.6 °C	1 mm	-1 mm
Apr	41.3 °C	+2.1 °C	1 mm	-8 mm
May	39.1 °C	+1.0 °C	12 mm	-13 mm
Jun	36.0 °C	+0.8 °C	48 mm	-1 mm
Jul	31.8 °C	-0.3 °C	109 mm	-1 mm
Aug	30.5 °C	-0.1 °C	133 mm	-41 mm
Sep	32.0 °C	+0.2 °C	76 mm	-21 mm
Oct	36.0 °C	+1.2 °C	10 mm	-12 mm
Nov	36.7 °C	+1.7 °C	0 mm	-1 mm
Dec	34.9 °C	+2.6 °C	0 mm	-0 mm

The year's extremes

Hottest day

43.3 °C

25 Apr 2025

Coldest day

17.2 °C

11 Jan 2025

Wettest day

34.6 mm

13 Jul 2025

Windiest day

22.7 km/h

17 Jul 2025

Strongest gust

47.2 km/h

17 Jul 2025

Hottest feels-like

47.0 °C

12 May 2025

Coldest feels-like

13.5 °C

11 Jan 2025

Sunniest day

12.0 h

10 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 Boulsa?

Boulsa has a hot semi-arid climate (Köppen BSh). Over 1940-2025, the average annual temperature is 28.2 °C and it receives 489 mm of precipitation per year.

What is the hottest day ever recorded in Boulsa?

The hottest day measured in Boulsa between 1940 and 2025 was 2 April 2024, reaching 43.7 °C.

What is the coldest day in Boulsa?

The coldest day measured in Boulsa between 1940 and 2025 was 13 January 1957, at 10.0 °C.

Does it snow in Boulsa?

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

Has the climate of Boulsa warmed?

Yes: Boulsa warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Boulsa?

The wettest day measured in Boulsa between 1940 and 2025 was 20 August 1944, with 152 mm of rain in 24 hours.

What was the windiest day in Boulsa?

The windiest day measured in Boulsa between 1940 and 2025 was 27 May 1946, with winds reaching 27.4 km/h.

What is the warmest month in Boulsa?

The warmest month in Boulsa is April (32.7 °C on average); the coldest is January (24.1 °C).

How much does it rain in Boulsa?

Boulsa receives on average 489 mm of precipitation per year, spread over about 78 rainy days.

Is it sunny in Boulsa?

Boulsa gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.

Are there tropical nights in Boulsa?

Yes: Boulsa has on average 275 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Boulsa?

In Boulsa, between 1940 and 2025, the highest apparent temperature reached 47.4 °C on 6 May 2019, and the lowest was 5.8 °C on 13 January 1957.

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