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Ave Max 77.8 (25.4); +1.3 (0.72)
Ave Min 48.7 (9.28); +0.9 (0.5)
Average for the month 63.25 (17.4); 1.34 (0.74) above long term mean; 1.1 (0.61) above the 1991-2020 normals.
Precipitation 2.84 inches (72.1 mm) +1.51 (38.4)
A slightly warmer and significantly wetter than average month. We had a shde over 200% of normal rainfall. But since September is generally a rather dry month in our part of the world, it still wasn't very much. It did help with our wildfire situation.
Other than the extra rainfall, September was a plain vanilla month.
What are we looking forward to for October? The Climate Prediction center is progging a bang on normal month with respect to temperatures and a little more than average precipitation.
September was a much better month than that awful August that preceded it. More sun, higher avg. max temp and much warmer spell in the first half. It was a decent month generally.
Temps averaged near normal (-0.2F). Precip above normal (+2.97").
Was summer-like with heat and humidity to start the month and mid-month. Had two periods of low humidity and cooler nights. Received some heavy rainfall from Hurricane Nicholas on Sept 14.
I got a good bit more rain than the airport with 9.78" for the month (I received more from training t-storms the evening of Sept 5 and also got more from Hurricane Nicholas).
Lowest max: 77F
Highest min: 76F
Days 90F or above: 13
Days with thunder: 7
Highest dewpoint: 78F
Lowest dewpoint: 49F
Average dewpoint: 67.7F
Location: Live:Downtown Phoenix, AZ/Work:Greater Los Angeles, CA
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September 2021 Phoenix, AZ Summary
Highest Temp 111°F
Lowest Temp 69°F
Minimum High 80°F
Maximum Low 87°F
Avg High 100.1°F Dep +0°F
Avg Low 78.4°F Dep +1.1°F
Mean Temp 89.25°F Dep +0.55°F
Total Precip 0.76 "
Departure +0.15 "
Records=1
I. 9th Record High
111°F Dep +9°F
Five Warmest Days
I. 9th 98.5°F (111°F/86°F)
II. 11th 96.5°F (108°F/85°F)
III. 12th 96°F (109°F/83°F)
IV. 7th 96°F (105°F/87°F)
Vtie. 10th 95.5°F (108°F/83°F)
Vtie. 13th 95.5°F (108°F/83°F)
Five Coolest Days
I. 26th 74.5°F (80°F/69°F)
II. 27th 78°F (86°F/70°F)
III. 30th 80°F (90°F/70°F)
IV. 29th 81°F (89°F/73°F)
V. 28th 81.5°F (91°F/72°F)
September 2021 Riverside, CA Summary
Highest Temp 107°F
Lowest Temp 53°F
Minimum High 74°F
Maximum Low 72°F
Avg High 91.3°F Dep -0.4°F
Avg Low 62.5°F Dep +0.6°F
Mean Temp 76.9°F Dep +0.1°F
Total Precip 0.00 "
Departure -0.11 "
Records=0
Five Warmest Days
I. 5th 86.5°F (107°F/66°F)
II. 10th 85.5°F (99°F/72°F)
III. 11th 85°F (101°F/69°F)
IV. 9th 85°F (99°F/71°F)
V. 22nd 84°F (101°F/67°F)
Five Coolest Days
I. 27th 68°F (74°F/62°F)
II. 28th 68°F (75°F/61°F)
III. 26th 69°F (78°F/60°F)
IV. 29th 69.5°F (79°F/60°F)
V. 17th 70.5°F (85°F/56°F)
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