Rio Arriba County climate

Rio Arriba County Weather in September

NOAA 1991-2020 normals for El Vado Dam, 9.8 km from Rio Arriba County

Average highs run from 79°F on September 1 to 71°F on September 30, and lows from 44°F to 33°F. Normal precipitation for the month is 1.67 in over about 8 wet days.

September day by day

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

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

September at a glance

Average high
76°F
Average low
39°F
Precipitation
1.67 in
Record high
94°FSep 11, 1934
Record low
23°FSep 29, 1936
Chance of a freeze
92%
Days of 90°F or more
0.8
Daylight
12 h 57 min to 11 h 50 min
Cloud cover
41%
Humidity
52%
Dew point
37°F
Wind
6.5 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
Sep 179°F44°F88°F 195043°F 193231%0%
Sep 279°F44°F88°F 195040°F 197630%0%
Sep 379°F43°F90°F 194836°F 196130%0%
Sep 479°F43°F89°F 194833°F 196129%0%
Sep 578°F43°F88°F 195238°F 196129%0%
Sep 678°F42°F90°F 202042°F 192829%0%
Sep 778°F42°F88°F 202042°F 194228%0%
Sep 878°F42°F86°F 197732°F 202028%0%
Sep 978°F41°F87°F 198431°F 202028%0%
Sep 1077°F41°F90°F 202132°F 202027%0%
Sep 1177°F40°F94°F 193434°F 202027%0%
Sep 1277°F40°F86°F 193440°F 192427%0%
Sep 1377°F40°F86°F 193539°F 198926%0%
Sep 1476°F39°F89°F 200034°F 198926%0%
Sep 1576°F39°F85°F 195637°F 199326%0%
Sep 1676°F39°F87°F 195638°F 194125%0%
Sep 1775°F38°F87°F 195635°F 196825%0%
Sep 1875°F38°F84°F 195230°F 197125%0%
Sep 1975°F38°F83°F 195226°F 197124%0%
Sep 2074°F37°F85°F 201433°F 196524%0%
Sep 2174°F37°F83°F 201625°F 198324%0%
Sep 2274°F36°F82°F 201229°F 199523%0%
Sep 2373°F36°F80°F 192231°F 199523%0%
Sep 2473°F36°F81°F 197932°F 200623%0%
Sep 2573°F35°F83°F 202029°F 200022%0%
Sep 2672°F35°F83°F 202031°F 197022%0%
Sep 2772°F35°F84°F 201528°F 199622%0%
Sep 2872°F34°F82°F 199824°F 193622%0%
Sep 2971°F34°F83°F 201023°F 193621%0%
Sep 3071°F33°F83°F 202425°F 198521%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Rio Arriba County, 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).

September 1
sunrise 6:38 AM, sunset 7:35 PM
September 30
sunrise 7:01 AM, sunset 6:51 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00292837 (El Vado Dam), public domain. Records: NOAA GHCN-Daily, station USC00295084, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.