Newcastle climate

Newcastle Weather in May

NOAA 1991-2020 normals for Renton Muni AP, 6.7 km from Newcastle

Average highs run from 63°F on May 1 to 69°F on May 31, and lows from 46°F to 52°F. Normal precipitation for the month is 1.86 in over about 11 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 Newcastle, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
66°F
Average low
49°F
Precipitation
1.86 in
Record high
92°FMay 14, 2023
Record low
37°FMay 1, 2011
Chance of a freeze
0%
Daylight
14 h 30 min to 15 h 42 min
Cloud cover
67%
Humidity
81%
Dew point
45°F
Wind
3.6 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 163°F46°F87°F 201437°F 201141%0%
May 263°F46°F87°F 201638°F 200641%0%
May 364°F46°F80°F 202640°F 200140%0%
May 464°F46°F81°F 202638°F 202040%0%
May 564°F47°F80°F 201341°F 199939%0%
May 664°F47°F85°F 201338°F 200239%0%
May 765°F47°F81°F 201637°F 200239%0%
May 865°F47°F82°F 202038°F 199938%0%
May 965°F47°F86°F 202039°F 200638%0%
May 1065°F48°F88°F 202037°F 199938%0%
May 1166°F48°F85°F 201939°F 201238%0%
May 1266°F48°F83°F 202638°F 201137%0%
May 1366°F48°F85°F 202340°F 201137%0%
May 1466°F49°F92°F 202341°F 199937%0%
May 1566°F49°F91°F 202342°F 200237%0%
May 1667°F49°F83°F 200639°F 200237%0%
May 1767°F49°F91°F 200837°F 201137%0%
May 1867°F50°F80°F 202339°F 200337%0%
May 1967°F50°F78°F 202339°F 200337%0%
May 2067°F50°F78°F 202342°F 202237%0%
May 2167°F50°F79°F 201543°F 202237%0%
May 2268°F50°F85°F 200143°F 201336%0%
May 2368°F51°F87°F 200144°F 200536%0%
May 2468°F51°F78°F 202542°F 201036%0%
May 2568°F51°F78°F 200146°F 200036%0%
May 2668°F51°F90°F 200547°F 199936%0%
May 2768°F51°F88°F 200545°F 202036%0%
May 2868°F51°F84°F 201747°F 200736%0%
May 2968°F52°F82°F 200944°F 199936%0%
May 3069°F52°F86°F 200742°F 201036%0%
May 3169°F52°F86°F 200143°F 202435%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Newcastle, in percent, and of at least 0.1 inch of snowfall.010203040501102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PDT).

May 1
sunrise 5:51 AM, sunset 8:21 PM
May 31
sunrise 5:16 AM, sunset 8:58 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094248 (Renton Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00094248, 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.