Home / Pima / 12 September 2018
Pima
United States · 12 September 2018
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Average
27.4°C
low 19.5° · high 34.4°
Rainfall
0mm
dry day
Wind
2.3m/s
daily average
Humidity
22.6%
daily average
Cloud
7%
cover
Pressure
1010hPa
daily average
The temperature ranged from 19.5°C around 03:00 to 34.4°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
76th percentile
Low temperature
56th percentile
Rainfall
63th percentile
Wind
61th 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 25.6°C, versus 27.4°C on this specific day.
Sun & daylight
Sunrise
06:00
Sunset
18:29
Day length
12h 28m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Phoenix.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 07:00 | 25.5 | 22.1 | 0 | 2.3 | NNW | 21 | 1010 |
| 01:00 | 08:00 | 24.7 | 21.3 | 0 | 2.4 | NW | 22 | 1010 |
| 02:00 | 09:00 | 22.5 | 18.9 | 0 | 2.6 | NW | 25 | 1011 |
| 03:00 | 10:00 | 19.5 | 16.7 | 0 | 2.1 | NNW | 36 | 1011 |
| 04:00 | 11:00 | 19.6 | 16.9 | 0 | 2.1 | N | 37 | 1011 |
| 05:00 | 12:00 | 19.8 | 17 | 0 | 2.2 | NNE | 37 | 1011 |
| 06:00 | 13:00 | 21.1 | 18.8 | 0 | 1.8 | NNE | 36 | 1012 |
| 07:00 | 14:00 | 22.4 | 20.5 | 0 | 1.2 | NE | 33 | 1012 |
| 08:00 | 15:00 | 26.1 | 24.2 | 0 | 0.6 | NE | 22 | 1013 |
| 09:00 | 16:00 | 28.9 | 27.2 | 0 | 0.1 | SW | 18 | 1012 |
| 10:00 | 17:00 | 31 | 28.4 | 0 | 0.9 | WSW | 14 | 1013 |
| 11:00 | 18:00 | 31.9 | 28.9 | 0 | 1.8 | WSW | 15 | 1012 |
| 12:00 | 19:00 | 32.4 | 29.2 | 0 | 2.6 | WSW | 16 | 1011 |
| 13:00 | 20:00 | 33.5 | 29.9 | 0 | 3.2 | W | 15 | 1010 |
| 14:00 | 21:00 | 34.4 | 30.7 | 0 | 3.6 | W | 16 | 1010 |
| 15:00 | 22:00 | 33.9 | 30.1 | 0 | 3.5 | W | 15 | 1009 |
| 16:00 | 23:00 | 34 | 30.5 | 0 | 3.2 | W | 16 | 1009 |
| 17:00 | 00:00 | 33.3 | 29.9 | 0 | 3.1 | W | 16 | 1009 |
| 18:00 | 01:00 | 32.1 | 29.1 | 0 | 2.3 | WNW | 17 | 1008 |
| 19:00 | 02:00 | 29.5 | 26.6 | 0 | 2.3 | NW | 20 | 1008 |
| 20:00 | 03:00 | 27 | 23.5 | 0 | 2.8 | NNW | 22 | 1009 |
| 21:00 | 04:00 | 25.8 | 22.2 | 0 | 3 | NNW | 24 | 1010 |
| 22:00 | 05:00 | 24.2 | 20.9 | 0 | 2.8 | NNW | 26 | 1010 |
| 23:00 | 06:00 | 23.8 | 20.5 | 0 | 2.6 | NNW | 26 | 1010 |
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
- Pima — 33.000°, -109.750°, ERA5 grid cell center, 13.6 km from requested point
- Time zone
- America/Phoenix
- What's shown here
- The hourly and daily record for 12 September 2018 specifically — not a monthly average. See the Pima 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 Pima, United States (33.00°N, 109.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Pima, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Pima, 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 Pima, 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.