Home / Arcata / 20 November 2021
Arcata
United States · 20 November 2021
← 19 November 202121 November 2021 →
Average
8.9°C
low 4.4° · high 14.5°
Rainfall
0mm
dry day
Wind
2.5m/s
daily average
Humidity
80.5%
daily average
Cloud
29%
cover
Pressure
1025hPa
daily average
The temperature ranged from 4.4°C around 05:00 to 14.5°C around 14:00. No measurable rain was recorded during the day.
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
81th percentile
Low temperature
31th percentile
Rainfall
37th percentile
Wind
53th percentile
A percentile of 100 means this was the hottest/wettest/windiest of the comparable days on file; 50 is right in the middle. This window's average temperature was 9°C, versus 8.9°C on this specific day.
Sun & daylight
Sunrise
07:09
Sunset
16:53
Day length
9h 45m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 08:00 | 6.8 | 4.8 | 0 | 1.5 | NE | 96 | 1024 |
| 01:00 | 09:00 | 6.4 | 4.2 | 0 | 1.7 | ENE | 96 | 1024 |
| 02:00 | 10:00 | 5.5 | 3 | 0 | 1.9 | ENE | 94 | 1024 |
| 03:00 | 11:00 | 5.3 | 2.7 | 0 | 2 | E | 94 | 1024 |
| 04:00 | 12:00 | 4.4 | 1.4 | 0 | 2.4 | E | 95 | 1024 |
| 05:00 | 13:00 | 4.4 | 1.2 | 0 | 2.6 | E | 94 | 1024 |
| 06:00 | 14:00 | 4.5 | 1.3 | 0 | 2.7 | E | 94 | 1025 |
| 07:00 | 15:00 | 4.9 | 1.5 | 0 | 2.9 | E | 92 | 1025 |
| 08:00 | 16:00 | 6.3 | 3 | 0 | 3.1 | E | 91 | 1025 |
| 09:00 | 17:00 | 8.1 | 5 | 0 | 2.9 | E | 82 | 1026 |
| 10:00 | 18:00 | 10.4 | 8.1 | 0 | 2.1 | ENE | 76 | 1026 |
| 11:00 | 19:00 | 12 | 10.1 | 0 | 1.7 | NE | 71 | 1026 |
| 12:00 | 20:00 | 13 | 10.7 | 0 | 1.8 | N | 61 | 1025 |
| 13:00 | 21:00 | 13.9 | 11 | 0 | 2.7 | N | 58 | 1025 |
| 14:00 | 22:00 | 14.5 | 11.4 | 0 | 3.2 | N | 57 | 1025 |
| 15:00 | 23:00 | 14.5 | 11.8 | 0 | 2.9 | N | 62 | 1025 |
| 16:00 | 00:00 | 14.3 | 11.8 | 0 | 2.9 | N | 66 | 1025 |
| 17:00 | 01:00 | 12.4 | 9.9 | 0 | 2.9 | NNE | 73 | 1024 |
| 18:00 | 02:00 | 10.6 | 8 | 0 | 2.8 | NNE | 80 | 1025 |
| 19:00 | 03:00 | 9.7 | 7.1 | 0 | 2.6 | NE | 80 | 1025 |
| 20:00 | 04:00 | 9.9 | 7.5 | 0 | 2.1 | ENE | 77 | 1025 |
| 21:00 | 05:00 | 8.5 | 5.5 | 0 | 2.6 | E | 80 | 1025 |
| 22:00 | 06:00 | 6.7 | 3.5 | 0 | 2.7 | E | 83 | 1025 |
| 23:00 | 07:00 | 6.9 | 3.5 | 0 | 2.8 | E | 79 | 1025 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
Data source & coverage — ERA5 reanalysis, 2016–2025 (10 years)details
- Source
- ERA5 reanalysis, accessed via the Copernicus Climate Change Service (C3S) Climate Data Store
- Data type
- Reanalysis — a physically consistent reconstruction combining a forecast model with historical observations, not a live station reading or a forecast
- Coverage
- 2016–2025 (10 years) for United States
- Location
- Arcata — 40.750°, -124.000°, ERA5 grid cell center, 14.7 km from requested point
- Time zone
- America/Los_Angeles
- What's shown here
- The hourly and daily record for 20 November 2021 specifically — not a monthly average. See the Arcata climate overview for typical conditions.
- Spatial resolution
- 0.25° (~25 km) distributed grid — ERA5's native model resolution is finer; this is the publicly distributed regridded product
- Version / refreshed
- Methodology v2026.07 · data last refreshed December 31, 2025
- Limitations
- A model reconstruction, not a station observation — hyper-local extremes (a single storm cell, an urban heat pocket) can differ from a nearby gauge. See the full methodology.
- Attribution
- Generated using Copernicus Climate Change Service information
Cite this data
PastClimate (2026-07-17). Historical climate data for Arcata, United States (40.75°N, 124.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Arcata, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Arcata, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Arcata, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.