Saipan climate — normals and trends

Q: What is the climate of Saipan?

Saipan has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.9 °C and it receives 1,722 mm of precipitation per year.

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

The hottest day measured in Saipan between 1940 and 2025 was 16 August 1946, reaching 30.0 °C.

Q: What is the coldest day in Saipan?

The coldest day measured in Saipan between 1940 and 2025 was 5 February 1972, at 23.1 °C.

Q: Does it snow in Saipan?

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

Q: Has the climate of Saipan warmed?

Yes: Saipan warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Saipan?

The wettest day measured in Saipan between 1940 and 2025 was 16 October 2015, with 234 mm of rain in 24 hours.

Q: What was the windiest day in Saipan?

The windiest day measured in Saipan between 1940 and 2025 was 11 November 1962, with winds reaching 118.5 km/h.

Q: What is the warmest month in Saipan?

The warmest month in Saipan is June (27.5 °C on average); the coldest is February (25.9 °C).

Q: How much does it rain in Saipan?

Saipan receives on average 1,722 mm of precipitation per year, spread over about 236 rainy days.

Q: Is it sunny in Saipan?

Saipan gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Saipan (Northern Mariana Islands) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.9 °C and it receives 1,722 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 June (27.5 °C on average) and the coldest is February (25.9 °C). Rainfall peaks in August.

Saipan averages 0 frost days, 0 hot days (≥ 30 °C) and 236 rainy days per year.

Saipan has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.

The hottest day of the period reached 30.0 °C (on 16 August 1946) and the coldest 23.1 °C (on 5 February 1972).

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

SaipanSaipan

coords: 15.21°, 145.75°
period: 1940–2025 · 86 yrs

AmTropical monsoonWarmest monthJuneColdest monthFebruaryWettest monthAugustDriest monthMarch

Mean daily temperature

26.9°C

Average daily high

27.6°C

Average daily low

26.1°C

Annual rainfall

1,722mm

Sunshine / day

10.9h

Mean relative humidity

81%

Average peak wind

28.9km/h

Seasonal range

1.6°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

0 d/yr

Rainy days (≥ 1 mm)

236 d/yr

Annual snowfall

0.0 cm

Average feels-like high

31.0 °C

Average feels-like low

28.1 °C

Average peak gust

39.5 km/h

Tropical nights (≥ 20 °C)

365 d/yr

Solar radiation

20.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.7 °C

since 1940

+0.1 °C per decade · r² = 0.58 · 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

30.0 °C

16 August 1946

Coldest day

23.1 °C

5 February 1972

Wettest day

234 mm

16 October 2015

Windiest day

118.5 km/h

11 November 1962

Strongest gust

157.3 km/h

2 November 1997

Hottest feels-like

38.4 °C

9 August 2024

Coldest feels-like

16.4 °C

11 November 1962

Sunniest day

12.8 h

20 June 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	29.4 °C19 June 2025	25.0 °C13 March 2025	27.6 °C	1,833 mm	0
2024	29.8 °C12 August 2024	24.4 °C20 February 2024	27.5 °C	2,088 mm	0
2023	29.4 °C4 September 2023	24.8 °C1 March 2023	27.4 °C	2,113 mm	0
2022	29.5 °C15 August 2022	24.8 °C3 January 2022	27.3 °C	2,020 mm	0
2021	29.5 °C24 July 2021	24.8 °C31 January 2021	27.5 °C	1,692 mm	0
2020	29.6 °C22 August 2020	24.6 °C13 February 2020	27.4 °C	1,428 mm	0
2019	29.6 °C7 July 2019	24.4 °C31 January 2019	27.3 °C	2,069 mm	0
2018	29.1 °C26 May 2018	24.4 °C29 January 2018	27.3 °C	2,246 mm	0
2017	29.9 °C12 August 2017	24.3 °C5 February 2017	27.5 °C	1,653 mm	0
2016	29.6 °C21 July 2016	24.3 °C22 February 2016	27.3 °C	1,719 mm	0
2015	29.7 °C6 October 2015	23.6 °C17 February 2015	27.1 °C	1,865 mm	0
2014	29.9 °C22 June 2014	23.9 °C18 February 2014	27.3 °C	1,967 mm	0
2013	29.3 °C26 July 2013	24.3 °C15 March 2013	27.3 °C	1,610 mm	0
2012	29.5 °C13 May 2012	24.7 °C20 January 2012	27.1 °C	1,921 mm	0
2011	29.2 °C5 June 2011	24.6 °C3 March 2011	27.1 °C	2,023 mm	0
2010	29.5 °C3 July 2010	24.4 °C26 February 2010	27.0 °C	1,378 mm	0
2009	29.4 °C15 June 2009	24.4 °C15 March 2009	27.2 °C	1,913 mm	0
2008	29.2 °C31 July 2008	24.2 °C19 February 2008	27.2 °C	1,418 mm	0
2007	29.7 °C9 July 2007	23.8 °C4 March 2007	27.1 °C	1,914 mm	0
2006	29.2 °C4 September 2006	24.3 °C7 March 2006	27.0 °C	1,599 mm	0
2005	29.0 °C29 June 2005	24.3 °C9 February 2005	27.0 °C	1,770 mm	0
2004	29.3 °C6 June 2004	24.5 °C11 January 2004	27.1 °C	2,255 mm	0
2003	29.7 °C7 September 2003	23.6 °C11 March 2003	27.0 °C	1,903 mm	0
2002	29.3 °C24 June 2002	24.3 °C30 January 2002	27.1 °C	1,588 mm	0
2001	29.4 °C11 June 2001	24.6 °C24 March 2001	27.2 °C	1,467 mm	0
2000	29.2 °C5 July 2000	24.5 °C21 January 2000	27.1 °C	1,715 mm	0
1999	29.3 °C27 August 1999	25.0 °C5 January 1999	27.2 °C	1,534 mm	0
1998	29.4 °C30 October 1998	24.0 °C20 March 1998	27.1 °C	948 mm	0
1997	29.2 °C11 July 1997	24.0 °C25 February 1997	26.9 °C	1,908 mm	0
1996	29.3 °C13 June 1996	24.2 °C22 February 1996	27.1 °C	2,125 mm	0
1995	29.1 °C3 July 1995	23.5 °C8 March 1995	26.8 °C	1,299 mm	0
1994	29.5 °C5 September 1994	24.2 °C25 February 1994	26.9 °C	1,772 mm	0
1993	28.8 °C21 June 1993	24.0 °C23 January 1993	26.6 °C	1,356 mm	0
1992	28.7 °C20 June 1992	23.6 °C26 February 1992	26.6 °C	1,280 mm	0
1991	29.2 °C3 August 1991	24.1 °C11 February 1991	26.6 °C	1,815 mm	0
1990	28.9 °C21 November 1990	23.4 °C21 February 1990	26.8 °C	1,887 mm	0
1989	28.8 °C3 July 1989	24.4 °C17 March 1989	26.9 °C	1,918 mm	0
1988	29.4 °C3 September 1988	24.2 °C19 February 1988	27.1 °C	1,531 mm	0
1987	28.9 °C20 October 1987	24.0 °C5 February 1987	26.8 °C	1,127 mm	0
1986	29.0 °C19 June 1986	24.3 °C18 February 1986	26.8 °C	2,117 mm	0
1985	28.9 °C23 November 1985	24.4 °C15 February 1985	26.8 °C	1,774 mm	0
1984	29.0 °C30 May 1984	24.4 °C9 February 1984	27.0 °C	1,473 mm	0
1983	29.2 °C13 September 1983	23.7 °C1 March 1983	26.6 °C	951 mm	0
1982	28.5 °C4 July 1982	23.8 °C14 February 1982	26.6 °C	1,582 mm	0
1981	29.4 °C4 August 1981	24.3 °C8 March 1981	27.0 °C	1,908 mm	0
1980	28.9 °C7 August 1980	24.0 °C28 January 1980	26.8 °C	2,107 mm	0
1979	29.1 °C18 August 1979	24.2 °C7 February 1979	26.8 °C	1,366 mm	0
1978	29.1 °C6 October 1978	23.4 °C7 February 1978	26.8 °C	2,173 mm	0
1977	29.2 °C1 September 1977	24.4 °C26 January 1977	26.8 °C	1,355 mm	0
1976	28.8 °C16 September 1976	23.6 °C16 February 1976	26.6 °C	2,032 mm	0
1975	28.7 °C12 July 1975	24.0 °C2 February 1975	26.6 °C	1,721 mm	0
1974	29.3 °C5 October 1974	24.0 °C15 January 1974	26.8 °C	1,839 mm	0
1973	28.8 °C1 September 1973	23.4 °C28 January 1973	26.8 °C	1,217 mm	0
1972	28.5 °C6 July 1972	23.1 °C5 February 1972	26.5 °C	1,542 mm	0
1971	28.8 °C30 May 1971	24.2 °C19 January 1971	26.9 °C	1,539 mm	0
1970	29.0 °C9 August 1970	24.3 °C10 February 1970	27.0 °C	1,272 mm	0
1969	28.8 °C12 October 1969	23.8 °C10 February 1969	26.8 °C	1,304 mm	0
1968	28.9 °C4 July 1968	23.8 °C14 February 1968	26.6 °C	1,757 mm	0
1967	29.2 °C2 August 1967	23.9 °C11 April 1967	26.7 °C	1,935 mm	0
1966	29.0 °C20 June 1966	23.7 °C4 March 1966	26.9 °C	1,166 mm	0
1965	28.7 °C16 September 1965	23.6 °C23 March 1965	26.6 °C	1,347 mm	0
1964	28.7 °C19 June 1964	24.0 °C5 February 1964	26.7 °C	1,792 mm	0
1963	28.7 °C10 September 1963	23.8 °C8 February 1963	26.6 °C	2,284 mm	0
1962	28.7 °C27 June 1962	24.3 °C10 February 1962	26.7 °C	2,166 mm	0
1961	28.7 °C28 July 1961	24.2 °C3 March 1961	26.7 °C	2,070 mm	0
1960	28.7 °C18 August 1960	24.1 °C26 March 1960	26.8 °C	2,037 mm	0
1959	28.7 °C12 November 1959	23.6 °C16 January 1959	26.6 °C	1,671 mm	0
1958	28.7 °C24 September 1958	23.9 °C26 March 1958	26.7 °C	1,719 mm	0
1957	28.7 °C12 September 1957	23.5 °C15 February 1957	26.8 °C	1,270 mm	0
1956	28.6 °C4 August 1956	24.0 °C18 January 1956	26.6 °C	1,661 mm	0
1955	28.8 °C8 October 1955	24.2 °C28 March 1955	26.7 °C	1,718 mm	0
1954	29.0 °C7 August 1954	24.2 °C17 February 1954	26.8 °C	1,995 mm	0
1953	28.9 °C14 September 1953	24.5 °C21 February 1953	26.9 °C	1,865 mm	0
1952	29.2 °C22 September 1952	24.3 °C11 January 1952	27.0 °C	1,448 mm	0
1951	29.0 °C16 October 1951	23.9 °C23 February 1951	26.9 °C	1,524 mm	0
1950	28.6 °C12 June 1950	23.9 °C21 February 1950	26.6 °C	1,710 mm	0
1949	28.8 °C22 June 1949	23.8 °C4 March 1949	26.7 °C	1,222 mm	0
1948	28.6 °C23 July 1948	23.6 °C10 March 1948	26.6 °C	1,584 mm	0
1947	28.9 °C18 November 1947	24.2 °C2 February 1947	26.9 °C	1,929 mm	0
1946	30.0 °C16 August 1946	24.5 °C23 February 1946	27.1 °C	2,605 mm	1
1945	29.0 °C13 July 1945	24.1 °C13 February 1945	27.0 °C	1,510 mm	0
1944	29.0 °C29 August 1944	23.9 °C16 February 1944	26.6 °C	1,775 mm	0
1943	28.6 °C22 June 1943	24.1 °C13 March 1943	26.6 °C	1,539 mm	0
1942	28.8 °C2 August 1942	23.5 °C23 February 1942	26.5 °C	2,156 mm	0
1941	28.7 °C3 August 1941	23.8 °C28 January 1941	26.6 °C	1,391 mm	0
1940	29.0 °C12 September 1940	23.3 °C14 February 1940	26.6 °C	2,284 mm	0

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

28.3 °C

+0.7 °C

Hot days (≥ 30 °C)

0 d/yr

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1833 mm

+111 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.1 °C	+1.3 °C	30 mm	-36 mm
Feb	27.2 °C	+0.8 °C	50 mm	-1 mm
Mar	27.4 °C	+0.8 °C	46 mm	-1 mm
Apr	27.9 °C	+0.8 °C	38 mm	-22 mm
May	28.5 °C	+0.8 °C	67 mm	-4 mm
Jun	28.8 °C	+0.6 °C	172 mm	+63 mm
Jul	28.5 °C	+0.3 °C	463 mm	+235 mm
Aug	28.6 °C	+0.4 °C	271 mm	-43 mm
Sep	28.5 °C	+0.4 °C	302 mm	+20 mm
Oct	28.7 °C	+0.6 °C	231 mm	-36 mm
Nov	28.9 °C	+0.9 °C	108 mm	-33 mm
Dec	28.4 °C	+0.9 °C	56 mm	-30 mm

The year's extremes

Hottest day

29.4 °C

19 Jun 2025

Coldest day

25.0 °C

13 Mar 2025

Wettest day

46.9 mm

27 Jul 2025

Windiest day

56.1 km/h

26 Jul 2025

Strongest gust

77.0 km/h

26 Jul 2025

Hottest feels-like

36.5 °C

2 Oct 2025

Coldest feels-like

24.4 °C

21 Feb 2025

Sunniest day

12.8 h

21 Jun 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 Saipan?

Saipan has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.9 °C and it receives 1,722 mm of precipitation per year.

What is the hottest day ever recorded in Saipan?

The hottest day measured in Saipan between 1940 and 2025 was 16 August 1946, reaching 30.0 °C.

What is the coldest day in Saipan?

The coldest day measured in Saipan between 1940 and 2025 was 5 February 1972, at 23.1 °C.

Does it snow in Saipan?

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

Has the climate of Saipan warmed?

Yes: Saipan warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Saipan?

The wettest day measured in Saipan between 1940 and 2025 was 16 October 2015, with 234 mm of rain in 24 hours.

What was the windiest day in Saipan?

The windiest day measured in Saipan between 1940 and 2025 was 11 November 1962, with winds reaching 118.5 km/h.

What is the warmest month in Saipan?

The warmest month in Saipan is June (27.5 °C on average); the coldest is February (25.9 °C).

How much does it rain in Saipan?

Saipan receives on average 1,722 mm of precipitation per year, spread over about 236 rainy days.

Is it sunny in Saipan?

Saipan gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.

Are there tropical nights in Saipan?

Yes: Saipan has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Saipan?

In Saipan, between 1940 and 2025, the highest apparent temperature reached 38.4 °C on 9 August 2024, and the lowest was 16.4 °C on 11 November 1962.

Compare Saipan with another city

Pick a second city: its normals will be set against these, indicator by indicator.

Nearby cities

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