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Plum

United States · 8 September 2018

PlumUnited States8:18 AM localChange location

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Average

16.4°C

low 12.4° · high 21.4°

Rainfall

19.8mm

rain recorded

Wind

3.5m/s

daily average

Humidity

91.7%

daily average

Cloud

100%

cover

Pressure

1020hPa

daily average

The temperature ranged from 12.4°C around 23:00 to 21.4°C around 00:00. Rain was recorded across 21 hours, from around 02:00 to 23:00 (19.8mm total).

How unusual was this day?

Compared against the same 135 calendar days (±7 days) across the other 9 years on file.

High temperature

12th percentile

Low temperature

33th percentile

Rainfall

97th percentile

Wind

92th 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 19.7°C, versus 16.4°C on this specific day.

Sun & daylight

Sunrise

06:52

Sunset

19:39

Day length

12h 47m

Hour by hour

Temperature (line) and hourly rainfall (bars), local time — America/New_York.

↓ Download CSV
00:0006:0012:0018:0023:00

Cumulative rainfall through the day.

00:0006:0012:0018:0023:00
Local timeUTCTemp °CFeels °CRain mmWind m/sDirHumidity %Pressure hPa
00:0004:0021.423.40.022.4NNE911020
01:0005:0020.522.40.032.3NNE931020
02:0006:0019.921.50.112.4NNE941019
03:0007:0019.921.40.962.4NNE951019
04:0008:0019.420.80.722.6NNE961019
05:0009:0019.119.80.813.3NE961019
06:0010:0018.218.80.912.7NE941019
07:0011:0017.517.41.273.2NE931019
08:0012:0016.816.10.713.6NE921020
09:0013:0016150.383.7NE921020
10:0014:0015.614.20.113.9NE901021
11:0015:0015.713.90.044.1ENE871021
12:0016:0015.913.80.134.3ENE841021
13:0017:0015.913.80.394.3ENE821021
14:0018:0015.913.90.574.4ENE841020
15:0019:0015.613.50.974.4ENE861020
16:0020:0015.1130.844.3ENE871020
17:0021:0014.812.51.154.5ENE871020
18:0022:0013.912.41.073.5ENE961020
19:0023:0013.712.51.253.2ENE961020
20:0000:0013.311.91.723.2ENE961021
21:0001:0013.311.61.93.5ENE951021
22:0002:0012.910.82.024ENE961021
23:0003:0012.4101.734.3ENE981021

Same date, other years

202520242023202220212020201920172016

Nearby cities

Penn Hills

0km away, same day

Monroeville

0km away, same day

Murrysville

0km away, same day

New Kensington

0km away, same day

Lower Burrell

0km away, same day

Natrona Heights

0km away, same day

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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
Plum — 40.500°, -79.750°, ERA5 grid cell center, 0.1 km from requested point
Time zone
America/New_York
What's shown here
The hourly and daily record for 8 September 2018 specifically — not a monthly average. See the Plum 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

Plain text
PastClimate (2026-07-17). Historical climate data for Plum, United States (40.50°N, 79.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
APA
PastClimate. (2026). Historical climate data for Plum, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
MLA
"Historical Climate Data for Plum, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
BibTeX
@misc{pastclimate,
  author = {PastClimate},
  title = {Historical climate data for Plum, 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/}
}

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