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Guam · precipitation record 1945–2026

Guam, GU

THIS YEAR · 2026
WETTEST THIS YEAR SINCE 2023
77.39in
4th wettest of 79 years · normal 43.75"
📖 Guam's full Precipitation Almanac →

Accumulation

TODAY
0.72in
16th wettest of 79 yrs
288% of normal
MONTH TO DATE
9.25in
30th driest of 80 yrs
89% of normal
LAST 90 DAYS
38.47in
18th wettest of 80 yrs
143% of normal
YEAR TO DATE
77.39in
4th wettest of 79 yrs
177% of normal

Extremes & Streaks

Biggest Day on Record

19.67in
on Dec 8, 2002 · in 82 years

Dry Streak

0days
current run under 0.01" · longest ever 18 days (to Dec 23, 1977)

Wet Streak

8days
consecutive days with rain · longest ever 55 days

Year to Date vs Normal

177%
77.39" of a normal 43.75" · wettest 112.43" (1976) · driest 20.57" (1998)

Wettest & Driest Years

The extremes of a 78-year record (1948–2025) — full calendar-year totals. The long-run average is 92.76" a year.

Wettest Years on Record

11976142.28in
22023140.01in
32004139.33in
42002139.06in
51997131.74in

Driest Years on Record

1199857.88in
2197359.14in
3198361.05in
4195961.62in
5197067.31in

Rainfall by Month

The seasonal rhythm — each month's normal precipitation, with this year's totals in blue. Where the blue bar clears the band, the month ran wetter than usual.
J
F
M
A
M
J
J
A
S
O
N
D
Normal (median)This year
Normally wettest in Sep (~13.64") and driest in Mar (~2.14"). Wettest calendar month ever: Aug 1997, 38.49".

This Day in History · Rainfall

Every year's rainfall on each of the next 7 dates at Guam — toggle a day below. The tallest bar (ringed) is the wettest on record for that date.

Wettest Aug 24 ever

4.40in
set in 1967

Rain on Aug 24

82%
of 79 years had measurable rain
1947: 0.38″1948: 0.00″1949: 0.01″1950: 0.14″1951: 0.40″1952: 0.00″1953: 1.68″1954: 0.85″1955: 2.13″1956: 0.04″1957: 0.54″1958: 3.03″1959: 0.00″1960: 0.00″1961: 0.36″1962: 0.98″1963: 0.53″1964: 0.05″1965: 0.00″1966: 0.66″1967: 4.40″1968: 0.27″1969: 0.00″1970: 0.03″1971: 0.00″1972: 0.30″1973: 0.01″1974: 0.00″1975: 0.06″1976: 0.09″1977: 0.37″1978: 0.02″1979: 0.01″1980: 0.27″1981: 0.00″1982: 0.00″1983: 2.46″1984: 0.25″1985: 0.00″1986: 2.02″1987: 0.33″1988: 0.10″1989: 0.68″1990: 1.87″1991: 0.31″1992: 2.55″1993: 1.13″1994: 0.40″1995: 0.41″1996: 0.08″1997: 4.00″1998: 0.02″1999: 0.09″2000: 0.43″2001: 0.17″2002: 0.10″2003: 0.00″2004: 3.64″2005: 0.17″2006: 0.57″2007: 0.14″2008: 0.00″2009: 0.12″2010: 0.02″2011: 1.97″2012: 0.16″2013: 0.72″2014: 0.13″2015: 0.28″2016: 0.24″2017: 0.65″2018: 0.59″2019: 0.84″2020: 0.56″2021: 0.15″2022: 0.10″2023: 0.54″2024: 0.00″2025: 0.72″0″1″2″3″4″5″19501960197019801990200020102020

This Year's Rainfall

Guam's cumulative rainfall so far this year against its own record — the normal accumulation, and the wettest & driest years to date. The bright line is the running total; where it rides the band tells the story at a glance.
Guam, GU — cumulative rainfall this year vs the record
Download year chart

Rainfall Calendar

Guam's entire daily record as one heatmap — each row a year, each cell a day, shaded by that day's rainfall. Dry spells read as dark blocks, wet seasons as brighter bands; the whole climate at a glance.
Guam, GU — daily rainfall every day on record
Download calendar

Sun & Location

Sun & Daylight Today

Sunrise6:09 AM
Sunset6:38 PM
Solar noon12:23 PM
Daylight12h 29m
Local standard time (no DST), level horizon.

Location

13.48°N, 144.80°WGuam

Nearby Stations

Saipan, MP129 mi NELihue, HI3703 mi WHonolulu, HI3794 mi WSt Paul Island, AK3822 mi WKahului, HI3892 mi WHilo, HI3987 mi W

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