River Road climate

River Road Weather in May

NOAA 1991-2020 normals for Washington Wwtp 4W, 8.9 km from River Road

Average highs run from 76°F on May 1 to 82°F on May 31, and lows from 55°F to 64°F. Normal precipitation for the month is 4.75 in over about 9 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at River Road, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
79°F
Average low
60°F
Precipitation
4.75 in
Record high
97°FMay 20, 1903
Record low
36°FMay 11, 1906
Chance of a freeze
0%
Days of 90°F or more
2.3
Daylight
13 h 38 min to 14 h 23 min
Cloud cover
56%
Humidity
76%
Dew point
60°F
Wind
7.8 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 176°F55°F92°F 190140°F 200627%0%
May 276°F56°F93°F 201043°F 200627%0%
May 377°F56°F96°F 190646°F 202627%0%
May 477°F56°F94°F 189446°F 200527%0%
May 577°F57°F94°F 190246°F 201127%0%
May 677°F57°F94°F 190648°F 202327%0%
May 777°F57°F94°F 190243°F 200528%0%
May 877°F58°F92°F 201043°F 190628%0%
May 978°F58°F92°F 190543°F 200528%0%
May 1078°F58°F91°F 190439°F 190628%0%
May 1178°F58°F89°F 189436°F 190628%0%
May 1278°F59°F91°F 190140°F 190728%0%
May 1378°F59°F95°F 190244°F 202128%0%
May 1478°F59°F96°F 190044°F 202128%0%
May 1579°F60°F95°F 190044°F 190429%0%
May 1679°F60°F92°F 190048°F 201629%0%
May 1779°F60°F95°F 189453°F 190629%0%
May 1879°F60°F93°F 189449°F 200929%0%
May 1979°F61°F95°F 190649°F 200929%0%
May 2079°F61°F97°F 190346°F 200929%0%
May 2180°F61°F96°F 190348°F 189429%0%
May 2280°F61°F93°F 190340°F 190729%0%
May 2380°F62°F97°F 190351°F 201630%0%
May 2480°F62°F94°F 190247°F 190530%0%
May 2580°F62°F96°F 201142°F 190530%0%
May 2681°F62°F94°F 202150°F 201330%0%
May 2781°F63°F94°F 202149°F 190230%0%
May 2881°F63°F94°F 201451°F 190230%0%
May 2981°F63°F94°F 201945°F 190730%0%
May 3082°F63°F94°F 201946°F 190430%0%
May 3182°F64°F95°F 201151°F 202130%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at River Road, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 6:16 AM, sunset 7:54 PM
May 31
sunrise 5:54 AM, sunset 8:17 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00319100 (Washington Wwtp 4W), public domain. Records: NOAA GHCN-Daily, station USC00319100, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.