Irvine weather in October: Irvine, California: normal highs, lows, rain and records for October
Irvine in October has a normal high of 84°F and a normal low of 58°F, a daily mean of 71°F, falling from 86°F on the 1st to 82°F by the 31st. Measurable precipitation falls on 2 days in a normal October, 0.62 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 14°C, 16 mm of precipitation in October.
- NOAA stationIrvine Ranch
- Station IDUSC00044303
- Location33.72°N 117.72°W
- Elevation540 ft (165 m)
- From the center4 miles
- Population318,683
- Jan 69° 49°
- Feb 71° 48°
- Mar 73° 50°
- Apr 76° 52°
- May 79° 56°
- Jun 83° 59°
- Jul 88° 62°
- Aug 90° 62°
- Sep 89° 62°
- Oct 84° 58°
- Nov 76° 53°
- Dec 68° 48°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Irvine in October?
The normal high is 84°F and the normal low 58°F, for a daily mean of 71.1°F. October is 4.2°F cooler than September and 7.1°F warmer than November. October is the 4th warmest month of the year in Irvine and the 7th wettest. Across the month the normal high falls 4°F, from 86°F on October 1 to 82°F on October 31. From one year to the next October's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 69°F and 74°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 7%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 86°F | 60°F | 4% | 3% |
| October 8 | 86°F | 59°F | 5% | 4% |
| October 15 | 85°F | 58°F | 6% | 5% |
| October 22 | 84°F | 57°F | 7% | 5% |
| October 31 | 82°F | 56°F | 7% | 5% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 86°F | 60°F | 4% | 3% | 11 h 50 min |
| October 2 | 86°F | 60°F | 4% | 3% | 11 h 50 min |
| October 3 | 86°F | 60°F | 4% | 3% | 11 h 50 min |
| October 4 | 86°F | 60°F | 5% | 4% | 11 h 50 min |
| October 5 | 86°F | 59°F | 5% | 4% | 11 h 40 min |
| October 6 | 86°F | 59°F | 5% | 4% | 11 h 40 min |
| October 7 | 86°F | 59°F | 5% | 4% | 11 h 40 min |
| October 8 | 86°F | 59°F | 5% | 4% | 11 h 40 min |
| October 9 | 85°F | 59°F | 5% | 4% | 11 h 40 min |
| October 10 | 85°F | 59°F | 5% | 4% | 11 h 30 min |
| October 11 | 85°F | 59°F | 6% | 4% | 11 h 30 min |
| October 12 | 85°F | 58°F | 6% | 4% | 11 h 30 min |
| October 13 | 85°F | 58°F | 6% | 5% | 11 h 30 min |
| October 14 | 85°F | 58°F | 6% | 5% | 11 h 30 min |
| October 15 | 85°F | 58°F | 6% | 5% | 11 h 20 min |
| October 16 | 85°F | 58°F | 6% | 5% | 11 h 20 min |
| October 17 | 84°F | 58°F | 6% | 5% | 11 h 20 min |
| October 18 | 84°F | 58°F | 6% | 5% | 11 h 20 min |
| October 19 | 84°F | 57°F | 6% | 5% | 11 h 20 min |
| October 20 | 84°F | 57°F | 7% | 5% | 11 h 10 min |
| October 21 | 84°F | 57°F | 7% | 5% | 11 h 10 min |
| October 22 | 84°F | 57°F | 7% | 5% | 11 h 10 min |
| October 23 | 83°F | 57°F | 7% | 5% | 11 h 10 min |
| October 24 | 83°F | 57°F | 7% | 5% | 11 h 10 min |
| October 25 | 83°F | 57°F | 7% | 5% | 11 h |
| October 26 | 83°F | 56°F | 7% | 5% | 11 h |
| October 27 | 83°F | 56°F | 7% | 5% | 11 h |
| October 28 | 82°F | 56°F | 7% | 5% | 11 h |
| October 29 | 82°F | 56°F | 7% | 5% | 11 h |
| October 30 | 82°F | 56°F | 7% | 5% | 10 h 50 min |
| October 31 | 82°F | 56°F | 7% | 5% | 10 h 50 min |
- Normal high
- 84°FOctober average
- Normal low
- 58°FOctober average
- Precipitation
- 0.62 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 7
- Daylight
- 11 h 50 min to 10 h 50 minOctober 1 to October 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 21
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00044303; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Irvine in October?
On a given October day the chance of 0.01 inch or more is 6% on average, highest around October 24 (7%). In all, 0.62 in falls on 2 days of a normal October.
In a normal October in Irvine, 7 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00044303.
What are the records for October in Irvine?
The October mean against the 1991-2020 normal of 71.1°F: 2021 68.6°F (−2.5), 2022 70.6°F (−0.5), 2023 66.3°F (−4.8), 2024 69.8°F (−1.3), 2025 67.9°F (−3.2). 0 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 68.6°F | −2.5°F | 0.80 in |
| 2022 | 70.6°F | −0.5°F | 0.50 in |
| 2023 | 66.3°F | −4.8°F | 0.51 in |
| 2024 | 69.8°F | −1.3°F | 0.00 in |
| 2025 | 67.9°F | −3.2°F | 1.18 in |
Source: recent months: ACIS, station USC00044303. Records and recent months use complete months only.
How does October in Irvine compare across California?
Across the 219 places PlainClimate covers in California, October normal highs run from 58°F in Tahoma to 93°F in Brawley; Irvine's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.