Ukiah weather in August: Ukiah, California: normal highs, lows, rain and records for August
Ukiah in August has a normal high of 94°F and a normal low of 55°F, a daily mean of 74°F, falling from 95°F on the 1st to 92°F by the 31st. Measurable precipitation falls on 0 days in a normal August, 0.07 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 34°C and low of 13°C, 2 mm of precipitation in August.
- NOAA stationUkiah Municipal Airport
- Station IDUSW00023275
- Location39.13°N 123.20°W
- Elevation601 ft (183 m)
- Population16,067
- Jan 58° 37°
- Feb 61° 39°
- Mar 65° 41°
- Apr 69° 43°
- May 78° 48°
- Jun 86° 52°
- Jul 94° 56°
- Aug 94° 55°
- Sep 89° 51°
- Oct 79° 45°
- Nov 65° 40°
- Dec 57° 36°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Ukiah in August?
The normal high is 94°F and the normal low 55°F, for a daily mean of 74.1°F. August is 0.9°F cooler than July and 4.3°F warmer than September. August is the 2nd warmest month of the year in Ukiah and the 11th wettest. Across the month the normal high falls 3°F, from 95°F on August 1 to 92°F on August 31. From one year to the next August's mean temperature typically moves about 1.5°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 73°F and 76°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 2%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 95°F | 56°F | 1% | 0% |
| August 8 | 95°F | 56°F | 1% | 0% |
| August 15 | 94°F | 55°F | 1% | – |
| August 22 | 93°F | 54°F | 1% | – |
| August 31 | 92°F | 53°F | 2% | – |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 95°F | 56°F | 1% | 0% | 14 h 10 min |
| August 2 | 95°F | 56°F | 1% | 0% | 14 h 10 min |
| August 3 | 95°F | 56°F | 1% | 0% | 14 h 10 min |
| August 4 | 95°F | 56°F | 1% | 0% | 14 h 10 min |
| August 5 | 95°F | 56°F | 1% | 0% | 14 h 10 min |
| August 6 | 95°F | 56°F | 1% | 0% | 14 h |
| August 7 | 95°F | 56°F | 1% | 0% | 14 h |
| August 8 | 95°F | 56°F | 1% | 0% | 14 h |
| August 9 | 94°F | 56°F | 1% | 0% | 14 h |
| August 10 | 94°F | 56°F | 1% | 0% | 14 h |
| August 11 | 94°F | 55°F | 1% | 0% | 13 h 50 min |
| August 12 | 94°F | 55°F | 1% | 0% | 13 h 50 min |
| August 13 | 94°F | 55°F | 1% | 0% | 13 h 50 min |
| August 14 | 94°F | 55°F | 1% | – | 13 h 50 min |
| August 15 | 94°F | 55°F | 1% | – | 13 h 40 min |
| August 16 | 94°F | 55°F | 1% | – | 13 h 40 min |
| August 17 | 93°F | 55°F | 1% | – | 13 h 40 min |
| August 18 | 93°F | 55°F | 1% | – | 13 h 40 min |
| August 19 | 93°F | 55°F | 1% | – | 13 h 40 min |
| August 20 | 93°F | 54°F | 1% | – | 13 h 30 min |
| August 21 | 93°F | 54°F | 1% | – | 13 h 30 min |
| August 22 | 93°F | 54°F | 1% | – | 13 h 30 min |
| August 23 | 93°F | 54°F | 1% | – | 13 h 30 min |
| August 24 | 93°F | 54°F | 1% | – | 13 h 20 min |
| August 25 | 93°F | 54°F | 1% | – | 13 h 20 min |
| August 26 | 92°F | 54°F | 1% | – | 13 h 20 min |
| August 27 | 92°F | 54°F | 1% | – | 13 h 20 min |
| August 28 | 92°F | 54°F | 1% | – | 13 h 10 min |
| August 29 | 92°F | 53°F | 1% | – | 13 h 10 min |
| August 30 | 92°F | 53°F | 2% | – | 13 h 10 min |
| August 31 | 92°F | 53°F | 2% | – | 13 h 10 min |
- Normal high
- 94°FAugust average
- Normal low
- 55°FAugust average
- Precipitation
- 0.07 inmonth total
- Days with precipitation
- fewer than 10.01 inch or more
- Days at 90°F or more
- 23
- Daylight
- 14 h 10 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 30
- Sunshine
- 91%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023275; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Ukiah in August?
On a given August day the chance of 0.01 inch or more is 1% on average, highest around August 31 (2%). In all, 0.07 in falls on 0 days of a normal August.
In a normal August in Ukiah, 23 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023275.
How humid and windy is Ukiah in August?
At 3 p.m. the normal temperature is 91°F with 22% relative humidity and a dew point of 47°F; at 6 a.m. it is 54°F with 79% humidity. The wind averages 3.6 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 54°F | 48°F | 79% | 0.7 mph | – |
| 9 a.m. | 68°F | 50°F | 52% | 1.9 mph | 94% |
| noon | 85°F | 49°F | 29% | 5.6 mph | 94% |
| 3 p.m. | 91°F | 47°F | 22% | 9.4 mph | 96% |
| 6 p.m. | 82°F | 47°F | 30% | 6.8 mph | – |
| 9 p.m. | 69°F | 48°F | 48% | 2.4 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00023275. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Ukiah?
The warmest August temperature on Ukiah's official record (since 1893) is 114°F, on August 7, 1908; the coldest is 38°F, on August 12, 1918. The wettest August brought 1.35 in (1968).
The August mean against the 1991-2020 normal of 74.1°F: 2021 77.6°F (+3.5), 2022 76.8°F (+2.7), 2023 76.4°F (+2.3), 2024 75.5°F (+1.4), 2025 75.9°F (+1.8), 2026 75.7°F (+1.6). 6 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 77.6°F | +3.5°F | 0.00 in |
| 2022 | 76.8°F | +2.7°F | 0.00 in |
| 2023 | 76.4°F | +2.3°F | 0.01 in |
| 2024 | 75.5°F | +1.4°F | 0.03 in |
| 2025 | 75.9°F | +1.8°F | 0.00 in |
| 2026 | 75.7°F | +1.6°F | 0.00 in |
Source: records: ACIS, NWS threaded record UKIthr; recent months: ACIS, station USW00023275. Records and recent months use complete months only.
How does August in Ukiah compare across California?
Across the 219 places PlainClimate covers in California, August normal highs run from 63°F in Bodega to 109°F in Needles; Ukiah's is 94°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.