Isulan climate — normals and trends

Q: What is the climate of Isulan?

Isulan has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.2 °C and it receives 2,179 mm of precipitation per year.

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

The hottest day measured in Isulan between 1940 and 2025 was 13 April 1998, reaching 38.7 °C.

Q: What is the coldest day in Isulan?

The coldest day measured in Isulan between 1940 and 2025 was 25 January 1965, at 16.8 °C.

Q: Does it snow in Isulan?

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

Q: Has the climate of Isulan warmed?

Yes: Isulan warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Isulan?

The wettest day measured in Isulan between 1940 and 2025 was 20 July 1945, with 276 mm of rain in 24 hours.

Q: What was the windiest day in Isulan?

The windiest day measured in Isulan between 1940 and 2025 was 16 October 2017, with winds reaching 19.2 km/h.

Q: What is the warmest month in Isulan?

The warmest month in Isulan is April (27.4 °C on average); the coldest is January (25.6 °C).

Q: How much does it rain in Isulan?

Isulan receives on average 2,179 mm of precipitation per year, spread over about 275 rainy days.

Q: Is it sunny in Isulan?

Isulan gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Isulan (Philippines) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.2 °C and it receives 2,179 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 (27.4 °C on average) and the coldest is January (25.6 °C). Rainfall peaks in June.

Isulan averages 0 frost days, 238 hot days (≥ 30 °C) and 275 rainy days per year.

Isulan has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.7 °C (on 13 April 1998) and the coldest 16.8 °C (on 25 January 1965).

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

IsulanSoccsksargen

coords: 6.63°, 124.61°
period: 1940–2025 · 86 yrs

AfTropical rainforestWarmest monthAprilColdest monthJanuaryWettest monthJuneDriest monthFebruary

Mean daily temperature

26.2°C

Average daily high

30.7°C

Average daily low

22.6°C

Annual rainfall

2,179mm

Sunshine / day

9.9h

Mean relative humidity

81%

Average peak wind

6.7km/h

Seasonal range

1.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

238 d/yr

Rainy days (≥ 1 mm)

275 d/yr

Annual snowfall

0.0 cm

Average feels-like high

36.6 °C

Average feels-like low

26.8 °C

Average peak gust

26.0 km/h

Tropical nights (≥ 20 °C)

362 d/yr

Solar radiation

18.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.8 °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

38.7 °C

13 April 1998

Coldest day

16.8 °C

25 January 1965

Wettest day

276 mm

20 July 1945

Windiest day

19.2 km/h

16 October 2017

Strongest gust

63.0 km/h

20 October 2017

Hottest feels-like

44.0 °C

14 April 2016

Coldest feels-like

18.2 °C

25 January 1965

Sunniest day

12.2 h

19 May 1973

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	34.6 °C24 April 2025	21.4 °C1 March 2025	27.1 °C	2,760 mm	318
2024	37.8 °C31 May 2024	21.3 °C21 February 2024	27.8 °C	2,608 mm	329
2023	35.6 °C29 April 2023	20.5 °C15 March 2023	27.3 °C	2,877 mm	313
2022	35.4 °C16 February 2022	21.1 °C5 February 2022	27.3 °C	3,001 mm	327
2021	34.9 °C5 April 2021	20.8 °C7 March 2021	27.2 °C	2,605 mm	317
2020	38.5 °C3 April 2020	21.3 °C19 December 2020	28.0 °C	2,228 mm	345
2019	37.3 °C27 April 2019	20.5 °C16 January 2019	28.3 °C	1,563 mm	349
2018	36.3 °C26 May 2018	21.8 °C29 March 2018	27.8 °C	1,670 mm	343
2017	35.7 °C1 May 2017	21.2 °C14 February 2017	27.0 °C	2,935 mm	306
2016	38.7 °C6 April 2016	21.6 °C19 February 2016	28.3 °C	2,363 mm	343
2015	36.8 °C24 April 2015	21.0 °C18 March 2015	27.8 °C	1,864 mm	328
2014	35.5 °C11 June 2014	19.9 °C27 January 2014	27.2 °C	2,429 mm	306
2013	35.0 °C5 May 2013	21.3 °C1 February 2013	27.0 °C	2,768 mm	300
2012	33.8 °C19 April 2012	21.0 °C26 January 2012	26.8 °C	2,440 mm	310
2011	34.5 °C4 April 2011	21.4 °C21 January 2011	26.8 °C	2,843 mm	311
2010	36.8 °C24 April 2010	21.7 °C6 February 2010	27.8 °C	2,036 mm	342
2009	35.3 °C7 April 2009	21.3 °C1 February 2009	27.2 °C	2,054 mm	322
2008	35.2 °C12 April 2008	20.7 °C27 January 2008	26.7 °C	2,701 mm	311
2007	37.0 °C12 April 2007	21.7 °C6 December 2007	27.3 °C	2,259 mm	316
2006	36.9 °C7 May 2006	21.4 °C14 January 2006	27.2 °C	1,998 mm	310
2005	36.7 °C30 April 2005	20.4 °C21 January 2005	27.3 °C	2,097 mm	315
2004	35.4 °C14 April 2004	20.7 °C9 January 2004	26.9 °C	1,694 mm	299
2003	35.2 °C23 April 2003	20.5 °C12 February 2003	26.7 °C	2,356 mm	276
2002	34.8 °C13 April 2002	19.6 °C3 March 2002	26.8 °C	1,758 mm	302
2001	33.0 °C9 April 2001	19.9 °C10 February 2001	26.1 °C	2,182 mm	243
2000	32.4 °C23 April 2000	20.3 °C25 January 2000	25.7 °C	2,546 mm	234
1999	32.8 °C13 April 1999	19.8 °C16 January 1999	25.6 °C	2,986 mm	195
1998	38.7 °C13 April 1998	20.7 °C30 January 1998	27.3 °C	1,949 mm	320
1997	34.6 °C7 December 1997	19.3 °C24 February 1997	26.3 °C	1,659 mm	281
1996	33.8 °C12 April 1996	18.9 °C31 December 1996	25.8 °C	2,363 mm	226
1995	35.3 °C6 May 1995	20.2 °C3 March 1995	26.2 °C	2,377 mm	256
1994	34.8 °C12 April 1994	20.0 °C12 February 1994	26.2 °C	1,902 mm	245
1993	37.0 °C3 May 1993	19.4 °C7 January 1993	26.5 °C	1,935 mm	273
1992	36.0 °C17 March 1992	19.3 °C10 December 1992	26.8 °C	1,581 mm	281
1991	36.3 °C16 April 1991	19.4 °C5 January 1991	26.9 °C	1,308 mm	314
1990	35.8 °C20 April 1990	18.9 °C21 December 1990	26.7 °C	1,692 mm	284
1989	34.8 °C7 May 1989	20.5 °C10 December 1989	26.2 °C	2,252 mm	264
1988	35.3 °C6 May 1988	20.9 °C1 October 1988	26.7 °C	1,869 mm	274
1987	35.4 °C13 May 1987	20.3 °C12 January 1987	26.8 °C	1,706 mm	285
1986	34.7 °C1 May 1986	19.3 °C17 February 1986	26.2 °C	2,093 mm	255
1985	34.6 °C12 March 1985	19.9 °C10 January 1985	26.1 °C	2,298 mm	255
1984	32.5 °C17 July 1984	19.3 °C22 November 1984	25.7 °C	2,313 mm	213
1983	36.8 °C17 April 1983	19.5 °C2 February 1983	26.6 °C	2,017 mm	258
1982	33.9 °C6 May 1982	20.0 °C3 January 1982	26.1 °C	1,786 mm	248
1981	34.9 °C23 April 1981	18.8 °C1 March 1981	26.2 °C	1,859 mm	239
1980	34.1 °C16 April 1980	20.5 °C24 February 1980	26.1 °C	2,260 mm	233
1979	35.5 °C18 April 1979	20.2 °C13 October 1979	26.3 °C	2,168 mm	255
1978	35.7 °C3 April 1978	18.9 °C4 January 1978	26.2 °C	2,500 mm	256
1977	35.7 °C4 May 1977	20.0 °C3 January 1977	26.0 °C	2,373 mm	210
1976	35.2 °C30 April 1976	19.9 °C5 February 1976	25.7 °C	2,228 mm	232
1975	35.5 °C19 April 1975	19.5 °C24 November 1975	25.7 °C	2,491 mm	238
1974	34.8 °C1 April 1974	18.8 °C16 January 1974	25.6 °C	2,073 mm	238
1973	37.8 °C4 April 1973	19.7 °C13 January 1973	26.8 °C	2,051 mm	315
1972	34.3 °C26 April 1972	19.9 °C5 February 1972	26.3 °C	1,693 mm	295
1971	35.1 °C18 April 1971	19.7 °C18 January 1971	25.9 °C	2,085 mm	251
1970	34.8 °C26 February 1970	20.3 °C7 February 1970	26.3 °C	2,133 mm	267
1969	36.3 °C21 April 1969	19.6 °C29 January 1969	26.3 °C	1,758 mm	280
1968	35.6 °C9 April 1968	20.0 °C12 December 1968	26.3 °C	1,519 mm	282
1967	34.2 °C20 April 1967	18.7 °C8 December 1967	25.6 °C	1,485 mm	201
1966	33.0 °C28 April 1966	19.0 °C11 January 1966	25.1 °C	1,902 mm	85
1965	30.6 °C25 May 1965	16.8 °C25 January 1965	24.5 °C	1,944 mm	12
1964	33.0 °C4 January 1964	18.8 °C21 January 1964	25.0 °C	2,472 mm	74
1963	36.4 °C11 May 1963	19.7 °C8 February 1963	26.4 °C	1,671 mm	282
1962	35.6 °C28 April 1962	19.5 °C20 January 1962	26.0 °C	2,043 mm	271
1961	36.5 °C21 April 1961	19.5 °C21 January 1961	26.3 °C	1,653 mm	288
1960	35.6 °C22 March 1960	19.1 °C7 December 1960	26.5 °C	1,840 mm	306
1959	36.5 °C18 March 1959	18.7 °C21 January 1959	26.2 °C	1,716 mm	285
1958	34.7 °C25 March 1958	19.7 °C5 December 1958	26.0 °C	1,833 mm	257
1957	34.0 °C23 April 1957	19.7 °C3 February 1957	25.6 °C	1,975 mm	207
1956	32.4 °C30 March 1956	19.1 °C2 February 1956	24.9 °C	3,032 mm	133
1955	34.4 °C16 April 1955	19.5 °C27 August 1955	25.4 °C	2,609 mm	205
1954	34.4 °C26 April 1954	19.5 °C3 January 1954	25.5 °C	2,483 mm	197
1953	35.6 °C28 April 1953	18.9 °C5 January 1953	25.9 °C	1,686 mm	238
1952	33.9 °C15 April 1952	18.3 °C6 January 1952	25.6 °C	2,107 mm	204
1951	33.1 °C24 April 1951	19.4 °C22 November 1951	25.5 °C	1,908 mm	199
1950	32.6 °C4 May 1950	18.3 °C29 December 1950	25.2 °C	2,283 mm	165
1949	31.8 °C28 July 1949	19.5 °C22 February 1949	24.9 °C	3,532 mm	75
1948	31.7 °C8 May 1948	18.7 °C10 February 1948	24.5 °C	2,347 mm	34
1947	30.6 °C17 March 1947	18.8 °C14 January 1947	24.6 °C	2,522 mm	23
1946	30.6 °C9 April 1946	19.5 °C23 December 1946	24.3 °C	2,166 mm	5
1945	32.3 °C21 April 1945	19.1 °C21 February 1945	24.7 °C	2,749 mm	72
1944	32.0 °C18 April 1944	18.9 °C7 February 1944	24.8 °C	2,349 mm	66
1943	30.5 °C14 June 1943	18.5 °C2 January 1943	24.2 °C	2,643 mm	5
1942	31.3 °C20 April 1942	18.3 °C7 December 1942	24.6 °C	2,140 mm	38
1941	32.3 °C22 April 1941	18.8 °C10 January 1941	24.8 °C	2,325 mm	69
1940	30.8 °C1 September 1940	18.5 °C19 February 1940	24.5 °C	2,019 mm	24

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

31.5 °C

+0.8 °C

Hot days (≥ 30 °C)

318 d/yr

+80

Frost days (< 0 °C)

0 d/yr

Annual rainfall

2760 mm

+581 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	30.9 °C	+1.0 °C	152 mm	+37 mm
Feb	30.6 °C	+0.2 °C	113 mm	+17 mm
Mar	31.9 °C	+0.3 °C	181 mm	+74 mm
Apr	32.7 °C	+0.2 °C	171 mm	+47 mm
May	32.3 °C	+0.5 °C	346 mm	+125 mm
Jun	31.1 °C	+0.4 °C	305 mm	+49 mm
Jul	31.4 °C	+1.3 °C	198 mm	-57 mm
Aug	30.9 °C	+0.6 °C	378 mm	+144 mm
Sep	31.6 °C	+1.2 °C	277 mm	+44 mm
Oct	31.5 °C	+1.1 °C	305 mm	+67 mm
Nov	31.4 °C	+1.0 °C	192 mm	+16 mm
Dec	31.7 °C	+1.5 °C	143 mm	+19 mm

The year's extremes

Hottest day

34.6 °C

24 Apr 2025

Coldest day

21.4 °C

1 Mar 2025

Wettest day

49.4 mm

6 Oct 2025

Windiest day

16.3 km/h

25 Sep 2025

Strongest gust

49.3 km/h

9 Nov 2025

Hottest feels-like

41.5 °C

11 Jun 2025

Coldest feels-like

24.9 °C

1 Mar 2025

Sunniest day

12.0 h

23 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 Isulan?

Isulan has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.2 °C and it receives 2,179 mm of precipitation per year.

What is the hottest day ever recorded in Isulan?

The hottest day measured in Isulan between 1940 and 2025 was 13 April 1998, reaching 38.7 °C.

What is the coldest day in Isulan?

The coldest day measured in Isulan between 1940 and 2025 was 25 January 1965, at 16.8 °C.

Does it snow in Isulan?

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

Has the climate of Isulan warmed?

Yes: Isulan warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Isulan?

The wettest day measured in Isulan between 1940 and 2025 was 20 July 1945, with 276 mm of rain in 24 hours.

What was the windiest day in Isulan?

The windiest day measured in Isulan between 1940 and 2025 was 16 October 2017, with winds reaching 19.2 km/h.

What is the warmest month in Isulan?

The warmest month in Isulan is April (27.4 °C on average); the coldest is January (25.6 °C).

How much does it rain in Isulan?

Isulan receives on average 2,179 mm of precipitation per year, spread over about 275 rainy days.

Is it sunny in Isulan?

Isulan gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Are there tropical nights in Isulan?

Yes: Isulan has on average 362 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Isulan?

In Isulan, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 14 April 2016, and the lowest was 18.2 °C on 25 January 1965.

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