Newcastle climate

Newcastle Weather in January

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

Average highs run from 47°F on January 1 to 49°F on January 31, and lows from 37°F to 37°F. Normal precipitation for the month is 4.93 in over about 18 wet days.

January 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.10203040506070151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

January at a glance

Average high
48°F
Average low
37°F
Precipitation
4.93 in
Snowfall
1.8 in
Record high
64°FJan 15, 2018
Record low
17°FJan 12, 2024
Chance of a freeze
95%
Daylight
8 h 31 min to 9 h 33 min
Cloud cover
72%
Humidity
92%
Dew point
32°F
Wind
5.6 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
Jan 147°F37°F58°F 200619°F 202259%5%
Jan 247°F37°F59°F 200324°F 201159%5%
Jan 347°F37°F62°F 202023°F 201159%5%
Jan 447°F37°F56°F 200320°F 200459%4%
Jan 547°F37°F59°F 202318°F 201759%4%
Jan 647°F37°F58°F 200220°F 201759%4%
Jan 747°F37°F61°F 200229°F 201759%4%
Jan 847°F37°F55°F 201331°F 201659%4%
Jan 948°F37°F58°F 202330°F 201659%4%
Jan 1048°F37°F57°F 202328°F 200759%4%
Jan 1148°F37°F59°F 201425°F 200559%4%
Jan 1248°F37°F58°F 202117°F 202459%4%
Jan 1348°F37°F60°F 202617°F 202459%5%
Jan 1448°F37°F61°F 202317°F 202458%5%
Jan 1548°F37°F64°F 201820°F 200758%5%
Jan 1648°F37°F57°F 201824°F 202458%5%
Jan 1748°F37°F58°F 201828°F 201358%5%
Jan 1848°F37°F63°F 200528°F 200958%5%
Jan 1948°F37°F64°F 200527°F 202558%5%
Jan 2048°F37°F59°F 201025°F 202558%5%
Jan 2148°F37°F60°F 200523°F 200858%5%
Jan 2249°F37°F56°F 200523°F 200858%5%
Jan 2349°F37°F58°F 200123°F 200858%5%
Jan 2449°F37°F60°F 200525°F 202658%5%
Jan 2549°F37°F61°F 201524°F 202658%5%
Jan 2649°F37°F63°F 201522°F 200958%5%
Jan 2749°F37°F60°F 201626°F 202558%5%
Jan 2849°F37°F62°F 202426°F 202558%5%
Jan 2949°F37°F60°F 202427°F 202357%5%
Jan 3049°F37°F62°F 202424°F 202357%5%
Jan 3149°F37°F60°F 202427°F 200757%5%

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.02040601102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (PST).

January 1
sunrise 7:57 AM, sunset 4:28 PM
January 31
sunrise 7:36 AM, sunset 5:09 PM

Every day of January: 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.