Fort Defiance climate

Fort Defiance Weather in August

NOAA 1991-2020 normals for Window Rock AP, 9.8 km from Fort Defiance

Average highs run from 86°F on August 1 to 83°F on August 31, and lows from 56°F to 48°F. Normal precipitation for the month is 1.85 in over about 11 wet days.

August day by day

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

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

August at a glance

Average high
85°F
Average low
52°F
Precipitation
1.85 in
Record high
97°FAug 14, 2020
Record low
35°FAug 25, 2002
Chance of a freeze
0%
Days of 90°F or more
4.3
Daylight
13 h 56 min to 12 h 57 min
Cloud cover
54%
Humidity
48%
Dew point
46°F
Wind
6.7 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
Aug 186°F56°F93°F 201847°F 200939%0%
Aug 286°F56°F93°F 200045°F 200938%0%
Aug 386°F55°F94°F 202647°F 202338%0%
Aug 486°F55°F94°F 202645°F 202538%0%
Aug 586°F55°F93°F 200947°F 202338%0%
Aug 686°F55°F95°F 201849°F 201538%0%
Aug 786°F55°F96°F 201846°F 201837%0%
Aug 885°F55°F93°F 201839°F 200937%0%
Aug 985°F54°F92°F 202536°F 200937%0%
Aug 1085°F54°F92°F 202041°F 200936%0%
Aug 1185°F54°F91°F 200240°F 200936%0%
Aug 1285°F54°F92°F 200242°F 202536%0%
Aug 1385°F53°F93°F 202039°F 199936%0%
Aug 1485°F53°F97°F 202040°F 200235%0%
Aug 1585°F53°F97°F 202042°F 200235%0%
Aug 1685°F53°F97°F 202040°F 201735%0%
Aug 1785°F52°F95°F 202042°F 200934%0%
Aug 1884°F52°F93°F 202040°F 200834%0%
Aug 1984°F52°F96°F 202038°F 200934%0%
Aug 2084°F52°F96°F 202040°F 200933%0%
Aug 2184°F51°F95°F 202043°F 200233%0%
Aug 2284°F51°F95°F 202044°F 200733%0%
Aug 2384°F51°F94°F 202042°F 200132%0%
Aug 2484°F50°F94°F 202042°F 200132%0%
Aug 2584°F50°F92°F 202035°F 200232%0%
Aug 2684°F50°F94°F 201937°F 200231%0%
Aug 2783°F50°F93°F 201942°F 200931%0%
Aug 2883°F49°F92°F 201938°F 200631%0%
Aug 2983°F49°F90°F 201539°F 200630%0%
Aug 3083°F49°F92°F 201941°F 200230%0%
Aug 3183°F48°F93°F 201941°F 200430%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Fort Defiance, 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 (MDT).

August 1
sunrise 6:24 AM, sunset 8:20 PM
August 31
sunrise 6:48 AM, sunset 7:45 PM

Every day of August: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00003029 (Window Rock AP), public domain. Records: NOAA GHCN-Daily, station USW00003029, 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.