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Apison

United States · 17 August 2021

← 16 August 202118 August 2021 →

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Average

22.8°C

low 21.8° · high 25.4°

Rainfall

78.7mm

rain recorded

Wind

3m/s

daily average

Humidity

90.3%

daily average

Cloud

77%

cover

Pressure

1014hPa

daily average

The temperature ranged from 21.8°C around 15:00 to 25.4°C around 19:00. Rain was recorded across 15 hours, from around 03:00 to 17:00 (78.7mm total).

How unusual was this day?

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

High temperature

0th percentile

Low temperature

41th percentile

Rainfall

100th percentile

Wind

93th 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 26.1°C, versus 22.8°C on this specific day.

Sun & daylight

Sunrise

07:01

Sunset

20:25

Day length

13h 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
00:0004:0023.526.60.031.8ESE871016
01:0005:0023.226.40.031.3ESE861016
02:0006:0022.825.70.061.5E871016
03:0007:002325.70.241.7NE851015
04:0008:0022.725.40.342NNE891015
05:0009:0022.925.70.742.3NNE911015
06:0010:002223.71.823.5NNE941015
07:0011:0021.923.64.73.4NNE931015
08:0012:0021.923.28.023.9NNE931015
09:0013:0021.8235.084.2NNE941015
10:0014:0021.922.98.64.4NNE941015
11:0015:0022.123.114.674.6NNE931015
12:0016:002222.915.124.6NNE941014
13:0017:0022.223.49.074.5N941013
14:0018:0021.822.94.564.5N951012
15:0019:0021.823.13.084.2NNW961012
16:0020:0022.123.81.793.8NW961012
17:0021:002325.10.633.6NW941012
18:0022:0024.526.90.083.7NNW901013
19:0023:0025.4280.012.9NW811013
20:0000:0025.127.802.2NW791013
21:0001:0023.326.301.3WNW851014
22:0002:0023.226.401.2WSW861015
23:0003:0022.325.101.7SW901016

Same date, other years

202520242023202220202019201820172016

Nearby cities

Collegedale

0km away, same day

South Cleveland

0km away, same day

Ringgold

0km away, same day

Chattanooga

22.8km away, same day

East Chattanooga

22.8km away, same day

East Ridge

22.8km 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
Apison — 35.000°, -85.000°, ERA5 grid cell center, 3.4 km from requested point
Time zone
America/New_York
What's shown here
The hourly and daily record for 17 August 2021 specifically — not a monthly average. See the Apison 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 (2026-07-16). Historical climate data for Apison, United States (35.00°N, 85.00°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 Apison, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
MLA
"Historical Climate Data for Apison, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
BibTeX
@misc{pastclimate,
  author = {PastClimate},
  title = {Historical climate data for Apison, United States},
  year = {2026},
  note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-16},
  url = {https://www.pastclimate.com/}
}

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