Home / Pima / 18 September 2017
Pima
United States · 18 September 2017
← 17 September 201719 September 2017 →
Average
24.4°C
low 17.5°C · high 32.3°C
Rainfall
0mm
dry day
Wind
2.3m/s
daily average
Humidity
23.9%
daily average
Cloud
1%
cover
Pressure
1013hPa
daily average
The temperature ranged from 17.5°C around 03:00 to 32.3°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
58th percentile
Low temperature
35th percentile
Rainfall
61th percentile
Wind
73th 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 24.5°C, versus 24.4°C on this specific day.
Sun & daylight
Sunrise
06:04
Sunset
18:20
Day length
12h 16m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Phoenix.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 07:00 | 18.8°C | 15.5°C | 0 | 2.7 | NW | 36 | 1013 |
| 01:00 | 08:00 | 19.6°C | 16.3°C | 0 | 2.6 | NW | 33 | 1013 |
| 02:00 | 09:00 | 19°C | 15.7°C | 0 | 2.5 | NNW | 33 | 1013 |
| 03:00 | 10:00 | 17.5°C | 14.4°C | 0 | 2.3 | N | 38 | 1014 |
| 04:00 | 11:00 | 17.6°C | 14.7°C | 0 | 1.8 | NNE | 36 | 1014 |
| 05:00 | 12:00 | 17.9°C | 15.5°C | 0 | 1.5 | NE | 38 | 1014 |
| 06:00 | 13:00 | 19.2°C | 17.1°C | 0 | 1.2 | NE | 37 | 1014 |
| 07:00 | 14:00 | 19.1°C | 17.1°C | 0 | 1 | NE | 36 | 1015 |
| 08:00 | 15:00 | 22.8°C | 20.3°C | 0 | 0.8 | E | 23 | 1015 |
| 09:00 | 16:00 | 25.2°C | 22.8°C | 0 | 1 | ESE | 22 | 1015 |
| 10:00 | 17:00 | 26.9°C | 24.2°C | 0 | 1.4 | SSE | 19 | 1015 |
| 11:00 | 18:00 | 28.4°C | 25.6°C | 0 | 1.8 | SSW | 20 | 1015 |
| 12:00 | 19:00 | 29.5°C | 26.6°C | 0 | 2.3 | SW | 20 | 1014 |
| 13:00 | 20:00 | 30.7°C | 27.4°C | 0 | 2.6 | WSW | 17 | 1012 |
| 14:00 | 21:00 | 31.7°C | 27.9°C | 0 | 3 | WSW | 16 | 1012 |
| 15:00 | 22:00 | 32.3°C | 28.3°C | 0 | 3.2 | W | 14 | 1010 |
| 16:00 | 23:00 | 32.3°C | 27.9°C | 0 | 3.7 | W | 14 | 1010 |
| 17:00 | 00:00 | 31.6°C | 27°C | 0 | 3.9 | WNW | 14 | 1009 |
| 18:00 | 01:00 | 30.3°C | 26.4°C | 0 | 2.7 | WNW | 14 | 1010 |
| 19:00 | 02:00 | 27.1°C | 23.6°C | 0 | 2.3 | NW | 17 | 1010 |
| 20:00 | 03:00 | 23.6°C | 19.6°C | 0 | 2.6 | NNW | 19 | 1011 |
| 21:00 | 04:00 | 22.1°C | 17.8°C | 0 | 2.8 | NNW | 19 | 1011 |
| 22:00 | 05:00 | 21.3°C | 17.4°C | 0 | 2.2 | NNW | 20 | 1011 |
| 23:00 | 06:00 | 20.9°C | 16.9°C | 0 | 2.3 | NNW | 20 | 1012 |
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 18 September 2017 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 (2026-07-21). 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 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Pima, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 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 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.