Home / Romulus / 9 January 2023
Romulus
United States · 9 January 2023
← 8 January 202310 January 2023 →
Average
0.1°C
low -2.5° · high 4.9°
Rainfall
0mm
dry day
Wind
3.5m/s
daily average
Humidity
72.1%
daily average
Cloud
37%
cover
Pressure
1020hPa
daily average
The temperature ranged from -2.5°C around 05:00 to 4.9°C around 16:00. 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
80th percentile
Low temperature
68th percentile
Rainfall
30th percentile
Wind
41th 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 -2.9°C, versus 0.1°C on this specific day.
Sun & daylight
Sunrise
08:02
Sunset
17:20
Day length
9h 18m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Detroit.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | -1.7 | -6.2 | 0 | 2.5 | W | 71 | 1021 |
| 01:00 | 06:00 | -1.4 | -6.1 | 0 | 2.8 | W | 69 | 1021 |
| 02:00 | 07:00 | -1.7 | -6.5 | 0 | 2.9 | W | 70 | 1020 |
| 03:00 | 08:00 | -1.7 | -6.5 | 0 | 2.9 | W | 71 | 1020 |
| 04:00 | 09:00 | -2.2 | -7.1 | 0 | 3 | W | 73 | 1020 |
| 05:00 | 10:00 | -2.5 | -7.2 | 0 | 2.9 | WSW | 78 | 1020 |
| 06:00 | 11:00 | -2.5 | -7.3 | 0 | 3.1 | W | 80 | 1021 |
| 07:00 | 12:00 | -2.1 | -7.2 | 0 | 3.6 | W | 80 | 1021 |
| 08:00 | 13:00 | -2 | -7.1 | 0 | 3.6 | WSW | 80 | 1021 |
| 09:00 | 14:00 | -1.4 | -6.6 | 0 | 3.8 | WSW | 78 | 1021 |
| 10:00 | 15:00 | -0.1 | -5.9 | 0 | 4.5 | W | 73 | 1021 |
| 11:00 | 16:00 | 1 | -4.7 | 0 | 4.4 | WSW | 67 | 1021 |
| 12:00 | 17:00 | 2.5 | -3.2 | 0 | 4.6 | WSW | 62 | 1020 |
| 13:00 | 18:00 | 3.4 | -2.4 | 0 | 4.8 | WSW | 60 | 1019 |
| 14:00 | 19:00 | 3.9 | -1.9 | 0 | 5 | WSW | 60 | 1018 |
| 15:00 | 20:00 | 4.4 | -1.4 | 0 | 5 | WSW | 60 | 1018 |
| 16:00 | 21:00 | 4.9 | -0.3 | 0 | 4.2 | WSW | 61 | 1018 |
| 17:00 | 22:00 | 2.4 | -2 | 0 | 2.8 | WSW | 67 | 1018 |
| 18:00 | 23:00 | 1.1 | -3.3 | 0 | 2.9 | WSW | 72 | 1018 |
| 19:00 | 00:00 | 0.4 | -4.2 | 0 | 3.1 | WSW | 76 | 1018 |
| 20:00 | 01:00 | 0 | -4.5 | 0 | 2.9 | SW | 78 | 1018 |
| 21:00 | 02:00 | -0.5 | -4.9 | 0 | 2.8 | WSW | 79 | 1019 |
| 22:00 | 03:00 | -1.4 | -5.6 | 0 | 2.5 | WSW | 82 | 1019 |
| 23:00 | 04:00 | -1.5 | -5.6 | 0 | 2.2 | WSW | 83 | 1019 |
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
- Romulus — 42.250°, -83.500°, ERA5 grid cell center, 9.1 km from requested point
- Time zone
- America/Detroit
- What's shown here
- The hourly and daily record for 9 January 2023 specifically — not a monthly average. See the Romulus 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 Romulus, United States (42.25°N, 83.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Romulus, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Romulus, 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 Romulus, 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.