Home / Half Moon / 15 September 2018

Half Moon

United States · 15 September 2018

← 14 September 201816 September 2018 →

Average

25.1°C

low 24.2° · high 25.9°

Rainfall

87.3mm

rain recorded

Wind

7.9m/s

daily average

Humidity

94.4%

daily average

Cloud

100%

cover

Pressure

1010hPa

daily average

The temperature ranged from 24.2°C around 23:00 to 25.9°C around 10:00. Rain was recorded across 24 hours, from around 00:00 to 23:00 (87.3mm total).

How unusual was this day?

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

High temperature

17th percentile

Low temperature

99th percentile

Rainfall

99th percentile

Wind

100th 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 23.3°C, versus 25.1°C on this specific day.

Sun & daylight

Sunrise

06:52

Sunset

19:16

Day length

12h 24m

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
00:0004:0024.624.17.388.9ESE951006
01:0005:0024.624.46.528.5ESE971007
02:0006:0024.624.66.168.4ESE961006
03:0007:0025.125.23.768.5ESE961006
04:0008:0025.325.34.28.9ESE961007
05:0009:002525.13.618.5ESE961006
06:0010:0025.526.13.628.2ESE951008
07:0011:0025.426.14.617.9ESE951008
08:0012:0025.325.95.157.8ESE941008
09:0013:0025.626.33.987.5ESE921009
10:0014:0025.926.92.557.4ESE921010
11:0015:0025.726.32.167.9ESE941011
12:0016:0025.626.21.697.8ESE931011
13:0017:0025.6262.468.2ESE941011
14:0018:0025.826.12.238.5E931011
15:0019:0025.625.73.678.7E941011
16:0020:0025.325.34.638.6ESE951011
17:0021:0025.225.23.588.4E951011
18:0022:0024.524.63.57.5E921011
19:0023:0024.424.92.887.1E941012
20:0000:0024.4252.036.9E951012
21:0001:0024.425.22.266.8E951012
22:0002:0024.3252.576.9E951013
23:0003:0024.224.92.096.7E941013

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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
Half Moon — 34.750°, -77.500°, ERA5 grid cell center, 9.2 km from requested point
Time zone
America/New_York
What's shown here
The hourly and daily record for 15 September 2018 specifically — not a monthly average. See the Half Moon 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 Half Moon, United States (34.75°N, 77.50°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 Half Moon, 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 Half Moon, 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 Half Moon, 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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