Arcata weather in October: Arcata, California: normal highs, lows, rain and records for October
Arcata in October has a normal high of 64°F and a normal low of 45°F, a daily mean of 54°F, falling from 65°F on the 1st to 61°F by the 31st. Measurable precipitation falls on 12 days in a normal October, 2.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 7°C, 69 mm of precipitation in October.
- NOAA stationArcata Eureka Airport
- Station IDUSW00024283
- Location40.98°N 124.11°W
- Elevation200 ft (61 m)
- Population18,748
- Jan 56° 41°
- Feb 57° 41°
- Mar 57° 41°
- Apr 58° 43°
- May 60° 46°
- Jun 63° 49°
- Jul 63° 51°
- Aug 65° 51°
- Sep 65° 49°
- Oct 64° 45°
- Nov 59° 42°
- Dec 56° 40°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Arcata in October?
The normal high is 64°F and the normal low 45°F, for a daily mean of 54.2°F. October is 2.6°F cooler than September and 3.7°F warmer than November. October is the 5th warmest month of the year in Arcata and the 7th wettest. Across the month the normal high falls 4°F, from 65°F on October 1 to 61°F on October 31. From one year to the next October's mean temperature typically moves about 1.7°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 53°F and 56°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 47%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 65°F | 47°F | 34% | 10% |
| October 8 | 65°F | 46°F | 36% | 12% |
| October 15 | 64°F | 45°F | 38% | 15% |
| October 22 | 63°F | 44°F | 42% | 19% |
| October 31 | 61°F | 44°F | 47% | 24% |
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 | 65°F | 47°F | 34% | 10% | 11 h 50 min |
| October 2 | 65°F | 47°F | 34% | 11% | 11 h 50 min |
| October 3 | 65°F | 47°F | 35% | 11% | 11 h 40 min |
| October 4 | 65°F | 46°F | 35% | 11% | 11 h 40 min |
| October 5 | 65°F | 46°F | 35% | 11% | 11 h 40 min |
| October 6 | 65°F | 46°F | 35% | 12% | 11 h 40 min |
| October 7 | 65°F | 46°F | 36% | 12% | 11 h 30 min |
| October 8 | 65°F | 46°F | 36% | 12% | 11 h 30 min |
| October 9 | 64°F | 46°F | 36% | 13% | 11 h 30 min |
| October 10 | 64°F | 46°F | 36% | 13% | 11 h 20 min |
| October 11 | 64°F | 46°F | 37% | 13% | 11 h 20 min |
| October 12 | 64°F | 45°F | 37% | 14% | 11 h 20 min |
| October 13 | 64°F | 45°F | 38% | 14% | 11 h 20 min |
| October 14 | 64°F | 45°F | 38% | 15% | 11 h 10 min |
| October 15 | 64°F | 45°F | 38% | 15% | 11 h 10 min |
| October 16 | 64°F | 45°F | 39% | 16% | 11 h 10 min |
| October 17 | 64°F | 45°F | 39% | 16% | 11 h 10 min |
| October 18 | 63°F | 45°F | 40% | 17% | 11 h |
| October 19 | 63°F | 45°F | 40% | 17% | 11 h |
| October 20 | 63°F | 45°F | 41% | 18% | 11 h |
| October 21 | 63°F | 44°F | 41% | 18% | 11 h |
| October 22 | 63°F | 44°F | 42% | 19% | 10 h 50 min |
| October 23 | 63°F | 44°F | 43% | 19% | 10 h 50 min |
| October 24 | 63°F | 44°F | 43% | 20% | 10 h 50 min |
| October 25 | 62°F | 44°F | 44% | 21% | 10 h 50 min |
| October 26 | 62°F | 44°F | 44% | 21% | 10 h 40 min |
| October 27 | 62°F | 44°F | 45% | 22% | 10 h 40 min |
| October 28 | 62°F | 44°F | 45% | 23% | 10 h 40 min |
| October 29 | 62°F | 44°F | 46% | 23% | 10 h 40 min |
| October 30 | 62°F | 44°F | 47% | 24% | 10 h 30 min |
| October 31 | 61°F | 44°F | 47% | 24% | 10 h 30 min |
- Normal high
- 64°FOctober average
- Normal low
- 45°FOctober average
- Precipitation
- 2.71 inmonth total
- Days with precipitation
- 120.01 inch or more
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 4
- Days at 80°F or more
- 1
- Sunshine
- 76%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024283; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Arcata in October?
On a given October day the chance of 0.01 inch or more is 40% on average, highest around October 31 (47%). In all, 2.71 in falls on 12 days of a normal October, 1 of them with an inch or more.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024283.
How humid and windy is Arcata in October?
At 3 p.m. the normal temperature is 58°F with 73% relative humidity and a dew point of 49°F; at 6 a.m. it is 47°F with 90% humidity. The wind averages 5.1 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 47°F | 44°F | 90% | 4.0 mph | 49% |
| 9 a.m. | 53°F | 48°F | 82% | 3.9 mph | 46% |
| noon | 58°F | 49°F | 72% | 7.6 mph | 49% |
| 3 p.m. | 58°F | 49°F | 73% | 8.4 mph | 52% |
| 6 p.m. | 53°F | 49°F | 86% | 4.4 mph | 52% |
| 9 p.m. | 50°F | 47°F | 90% | 4.1 mph | 54% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024283. 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 October in Arcata?
The warmest October temperature on this station's record (since 1945) is 91°F, on October 25, 2003; the coldest is 29°F, on October 31, 2002. The wettest October brought 12.03 in (2016).
The October mean against the 1991-2020 normal of 54.2°F: 2021 53.7°F (−0.5), 2022 52.6°F (−1.6), 2023 55.5°F (+1.3), 2024 54.9°F (+0.7), 2025 54.2°F (at normal). 2 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.7°F | −0.5°F | 5.40 in |
| 2022 | 52.6°F | −1.6°F | 0.21 in |
| 2023 | 55.5°F | +1.3°F | 3.16 in |
| 2024 | 54.9°F | +0.7°F | 2.15 in |
| 2025 | 54.2°F | at normal | 3.10 in |
Source: records: ACIS, station USW00024283; recent months: ACIS, station USW00024283. Records and recent months use complete months only.
How does October in Arcata 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; Arcata's is 64°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.