current run under 0.01" · longest ever 59 days (to Jun 19, 1989)
Wet Streak
4days
consecutive days with rain · longest ever 21 days
Year to Date vs Normal
88%
15.28" of a normal 17.34" · wettest 43.98" (1983) · driest 6.2" (1956)
Wettest & Driest Years
The extremes of a 61-year record (1951–2025) — full calendar-year totals. The long-run average is 39.54" a year.
Wettest Years on Record
1
1959
70.09in
2
2020
64.55in
3
1958
63.7in
4
1983
63.23in
5
1953
57.16in
Driest Years on Record
1
1951
20.99in
2
1989
21.16in
3
1961
22.21in
4
2004
23.19in
5
1955
23.55in
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 (~5.42") and driest in Mar (~1.16"). Wettest calendar month ever: Oct 2011, 20.34".
This Day in History · Rainfall
Every year's rainfall on each of the next 7 dates at Marathon — toggle a day below. The tallest bar (ringed) is the wettest on record for that date.
Wettest Jul 28 ever
1.94in
set in 1995
Rain on Jul 28
38%
of 66 years had measurable rain
Wettest Jul 29 ever
1.04in
set in 1953
Rain on Jul 29
36%
of 66 years had measurable rain
Wettest Jul 30 ever
1.79in
set in 1983
Rain on Jul 30
35%
of 66 years had measurable rain
Wettest Jul 31 ever
1.32in
set in 2017
Rain on Jul 31
41%
of 66 years had measurable rain
Wettest Aug 1 ever
3.53in
set in 2001
Rain on Aug 1
33%
of 67 years had measurable rain
Wettest Aug 2 ever
2.77in
set in 1988
Rain on Aug 2
34%
of 67 years had measurable rain
Wettest Aug 3 ever
3.84in
set in 2014
Rain on Aug 3
40%
of 67 years had measurable rain
This Year's Rainfall
Marathon'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.
Marathon'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.
