Home / Arcata / 21 November 2018
Arcata
United States · 21 November 2018
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Average
10.4°C
low 9.4° · high 11.4°
Rainfall
25.6mm
rain recorded
Wind
4.5m/s
daily average
Humidity
84.7%
daily average
Cloud
96%
cover
Pressure
1011hPa
daily average
The temperature ranged from 9.4°C around 22:00 to 11.4°C around 13:00. Rain was recorded across 21 hours, from around 00:00 to 23:00 (25.6mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
33th percentile
Low temperature
90th percentile
Rainfall
93th percentile
Wind
82th 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 8.8°C, versus 10.4°C on this specific day.
Sun & daylight
Sunrise
07:10
Sunset
16:53
Day length
9h 43m
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 | 10.5 | 6.1 | 0.25 | 4.2 | SE | 60 | 1012 |
| 01:00 | 09:00 | 10.9 | 6.4 | 0.02 | 4.2 | SE | 56 | 1012 |
| 02:00 | 10:00 | 11 | 7.2 | 0.04 | 3.6 | SE | 65 | 1011 |
| 03:00 | 11:00 | 10.7 | 6.8 | 0.12 | 4.1 | SE | 69 | 1011 |
| 04:00 | 12:00 | 10.5 | 6.5 | 0.34 | 4.2 | SE | 71 | 1011 |
| 05:00 | 13:00 | 9.8 | 5.8 | 1.3 | 4.3 | SE | 79 | 1011 |
| 06:00 | 14:00 | 9.5 | 5.5 | 1.81 | 4.6 | SE | 82 | 1010 |
| 07:00 | 15:00 | 9.5 | 5.5 | 0.74 | 5 | SE | 88 | 1011 |
| 08:00 | 16:00 | 10.1 | 6 | 1.21 | 5.2 | SE | 87 | 1011 |
| 09:00 | 17:00 | 10.5 | 6.2 | 1.39 | 5.6 | SE | 87 | 1011 |
| 10:00 | 18:00 | 10.7 | 6.3 | 1.42 | 5.8 | SE | 88 | 1011 |
| 11:00 | 19:00 | 10.9 | 6.8 | 0.13 | 5.7 | SSE | 90 | 1011 |
| 12:00 | 20:00 | 11.3 | 7.4 | 0.93 | 5.6 | SSE | 92 | 1011 |
| 13:00 | 21:00 | 11.4 | 8.3 | 2.76 | 4.5 | S | 91 | 1010 |
| 14:00 | 22:00 | 11.1 | 8.4 | 5.19 | 4 | S | 94 | 1010 |
| 15:00 | 23:00 | 11.2 | 8.4 | 2.36 | 4 | S | 91 | 1010 |
| 16:00 | 00:00 | 11 | 7.5 | 0.93 | 4.9 | SSW | 93 | 1011 |
| 17:00 | 01:00 | 10.8 | 7.8 | 0.77 | 4.2 | S | 93 | 1011 |
| 18:00 | 02:00 | 10.2 | 7.2 | 0.54 | 3.9 | SSE | 91 | 1012 |
| 19:00 | 03:00 | 9.8 | 6.7 | 0.04 | 3.9 | SSE | 91 | 1011 |
| 20:00 | 04:00 | 9.7 | 6.7 | 0.29 | 3.7 | SSE | 91 | 1012 |
| 21:00 | 05:00 | 9.5 | 6.3 | 0.64 | 4.1 | S | 93 | 1012 |
| 22:00 | 06:00 | 9.4 | 6.2 | 0.57 | 4 | S | 94 | 1013 |
| 23:00 | 07:00 | 9.5 | 6.5 | 1.85 | 3.8 | S | 95 | 1013 |
Nearby cities
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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 21 November 2018 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.