Home / Gilbert / 18 September 2018
Gilbert
United States · 18 September 2018
← 17 September 201819 September 2018 →
Average
33.7°C
low 27.8°C · high 39.3°C
Rainfall
0mm
dry day
Wind
2.4m/s
daily average
Humidity
27.1%
daily average
Cloud
19%
cover
Pressure
1006hPa
daily average
The temperature ranged from 27.8°C around 04:00 to 39.3°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
80th percentile
Low temperature
93th percentile
Rainfall
73th percentile
Wind
76th 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 30.3°C, versus 33.7°C on this specific day.
Sun & daylight
Sunrise
06:12
Sunset
18:29
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 | 31.5°C | 29.5°C | 0 | 2.6 | WNW | 25 | 1006 |
| 01:00 | 08:00 | 30.8°C | 28.6°C | 0 | 2.9 | WNW | 26 | 1006 |
| 02:00 | 09:00 | 31.3°C | 29.1°C | 0 | 2.5 | W | 24 | 1006 |
| 03:00 | 10:00 | 29.8°C | 28.7°C | 0 | 1.3 | SE | 28 | 1007 |
| 04:00 | 11:00 | 27.8°C | 26.6°C | 0 | 1.7 | SSE | 33 | 1007 |
| 05:00 | 12:00 | 28.1°C | 26.6°C | 0 | 2 | S | 32 | 1008 |
| 06:00 | 13:00 | 28.2°C | 27°C | 0 | 1.5 | S | 31 | 1008 |
| 07:00 | 14:00 | 28°C | 27°C | 0 | 1.5 | SSE | 32 | 1009 |
| 08:00 | 15:00 | 30.4°C | 29.3°C | 0 | 2 | S | 30 | 1010 |
| 09:00 | 16:00 | 32.2°C | 31.9°C | 0 | 2.4 | SW | 34 | 1010 |
| 10:00 | 17:00 | 34.1°C | 34°C | 0 | 2.4 | W | 32 | 1010 |
| 11:00 | 18:00 | 35°C | 35°C | 0 | 2.3 | WNW | 30 | 1009 |
| 12:00 | 19:00 | 36°C | 35.9°C | 0 | 2.1 | WNW | 28 | 1008 |
| 13:00 | 20:00 | 37.6°C | 37.4°C | 0 | 2.3 | WNW | 25 | 1007 |
| 14:00 | 21:00 | 38.6°C | 37.5°C | 0 | 2.7 | W | 21 | 1006 |
| 15:00 | 22:00 | 39°C | 37.8°C | 0 | 2.6 | W | 20 | 1005 |
| 16:00 | 23:00 | 39.3°C | 37.9°C | 0 | 3.3 | WNW | 21 | 1005 |
| 17:00 | 00:00 | 39.3°C | 37.6°C | 0 | 3.5 | WNW | 20 | 1004 |
| 18:00 | 01:00 | 38.6°C | 36.6°C | 0 | 3.5 | W | 20 | 1004 |
| 19:00 | 02:00 | 37°C | 35.3°C | 0 | 2.8 | W | 20 | 1004 |
| 20:00 | 03:00 | 35°C | 34.5°C | 0 | 2.4 | W | 27 | 1004 |
| 21:00 | 04:00 | 34.3°C | 33.9°C | 0 | 2.1 | W | 29 | 1005 |
| 22:00 | 05:00 | 33.8°C | 33.8°C | 0 | 2 | WSW | 31 | 1005 |
| 23:00 | 06:00 | 33°C | 32.1°C | 0 | 2.6 | WSW | 30 | 1005 |
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
- Gilbert — 33.250°, -111.750°, ERA5 grid cell center, 12.0 km from requested point
- Time zone
- America/Phoenix
- What's shown here
- The hourly and daily record for 18 September 2018 specifically — not a monthly average. See the Gilbert 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 (2026-07-20). Historical climate data for Gilbert, United States (33.25°N, 111.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Gilbert, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Gilbert, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Gilbert, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.