current run under 0.01" · longest ever 38 days (to Nov 9, 2024)
Wet Streak
0days
consecutive days with rain · longest ever 9 days
Year to Date vs Normal
106%
24.55" of a normal 23.09" · wettest 38.68" (1972) · driest 13.32" (1986)
Wettest & Driest Years
The extremes of a 63-year record (1963–2025) — full calendar-year totals. The long-run average is 41.24" a year.
Wettest Years on Record
1
2018
66.74in
2
2003
65.67in
3
1972
59.05in
4
1996
58.09in
5
1979
55.43in
Driest Years on Record
1
2007
27.02in
2
1965
28.86in
3
2025
30.17in
4
1986
30.38in
5
1981
32.13in
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 May (~4.18") and driest in Feb (~2.47"). Wettest calendar month ever: Jun 1972, 18.19".
This Day in History · Rainfall
Every year's rainfall on each of the next 7 dates at Sterling-Dulles Airport — toggle a day below. The tallest bar (ringed) is the wettest on record for that date.
Wettest Jul 28 ever
1.65in
set in 2000
Rain on Jul 28
43%
of 65 years had measurable rain
Wettest Jul 29 ever
0.92in
set in 2001
Rain on Jul 29
45%
of 65 years had measurable rain
Wettest Jul 30 ever
1.29in
set in 2018
Rain on Jul 30
33%
of 64 years had measurable rain
Wettest Jul 31 ever
1.87in
set in 1978
Rain on Jul 31
38%
of 64 years had measurable rain
Wettest Aug 1 ever
1.09in
set in 2018
Rain on Aug 1
38%
of 64 years had measurable rain
Wettest Aug 2 ever
1.37in
set in 2004
Rain on Aug 2
30%
of 64 years had measurable rain
Wettest Aug 3 ever
1.03in
set in 1970
Rain on Aug 3
38%
of 64 years had measurable rain
This Year's Rainfall
Sterling-Dulles Airport'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.
Sterling-Dulles Airport'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.
