Glendale, AZ weather in August
Glendale is very hot and mostly dry in August: highs average 104°F and nights drop to about 79°F. There are about 5 days with rain. This is the peak of the warm season in Glendale. Midday heat is the main thing to plan around.
- Normal high
- 104°F
- Normal low
- 79°F
- Wet days
- 5
- 0.9 in total
- Muggy days
- 5
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 104°F | 102°F |
| Normal low | 81°F | 77°F |
| Chance of a wet day | 15% | 13% |
| Sunrise / sunset | 5:41 am / 7:28 pm | 6:02 am / 6:55 pm |
| Daylight | 13.8 h | 12.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Arizona time (no daylight saving)).
A typical August day
- 6 am85°Fdew point 61°F
- 9 am91°Fdew point 60°F
- Noon98°Fdew point 58°F
- 3 pm103°Fdew point 56°F
- 6 pm102°Fdew point 55°F
- 9 pm96°Fdew point 57°F
NOAA hourly normals (local standard time) from Phoenix Sky Harbor Intl Airport (13 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more31 of 31
- Muggy daysdaily mean dew point 65°F or more5 of 31
- Wet daysat least 0.01 in of rain or melted snow5 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 0.9 in; a dry August brings about 0.3 in and a wet one about 1.3 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How August varies from year to year
- Warmest August, 1991-20202020: average high 110°F
- Coolest August2014: average high 103°F
- Wettest August2008: 3.5 in
- Driest August2002: no measurable precipitation
- Highest reading116°F (August 14, 2020)
- Lowest reading64°F (August 25, 2002)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 105°F | 104°F | 98°F |
| Normal low | 80°F | 79°F | 73°F |
| Wet days | 4 | 5 | 3 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 14.1 h | 13.4 h | 12.4 h |
Highs change by -1°F from July and -6°F into September.
Nearby alternatives in August
- Drier: Yuma, AZ152 mi · high 106°F · 1 wet day
- Cooler: Sedona, AZ95 mi · high 94°F · 9 wet days
How Glendale ranks in August
- Normal high8th warmest of 378 cities; 6th of 13 in Arizona
- Wet days82nd driest of 378
- Comfortable days261st most of 341
What to pack for Glendale in August
- Light, breathable clothing – highs near 104°F and about 5 muggy days
- Layers – afternoons near 104°F but nights near 79°F
Heating and cooling
August has 0 heating degree days and 818 cooling degree days (base 65°F), 16% of the year's total heating and cooling demand.
Questions
How hot is Glendale in August?
The normal high is 104°F and the normal low is 79°F. From 1991 to 2020 the hottest August reading was 116°F (most recently on August 14, 2020).
Does it rain a lot in Glendale in August?
About 5 days in August have at least 0.01 in of precipitation, and the normal total is 0.9 in. The wettest August in 1991-2020 was in 2008 (3.6 in); the driest was in 2002, with no measurable precipitation.
Is August a good time to visit Glendale?
August ranks 11th of 12 months on our comfort score for Glendale (34 out of 100). It has almost no comfortable days and about 31 days at 90°F or hotter. The best month is February.
Where the numbers come from
- Temperature and frost dates: Youngtown (USC00029634), 7.7 mi WNW of the city center, 1,135 ft . NOAA normals and daily records, 1991-2020.
- Rain and humidity and wind by hour: Phoenix Sky Harbor Intl Airport (USW00023183), 13 mi SE of the city center, 1,107 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Tempe ASU (USC00028499), 17 mi ESE of the city center, 1,167 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Phoenix Sky Harbor Intl Airport (722780-23183), 13 mi SE of the city center, 1,113 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).