Home / Riverdale / 17 September 2018
Riverdale
United States · 17 September 2018
← 16 September 201818 September 2018 →
Average
25.8°C
low 20.3° · high 31.8°
Rainfall
0.1mm
dry day
Wind
1.7m/s
daily average
Humidity
77.7%
daily average
Cloud
19%
cover
Pressure
1013hPa
daily average
The temperature ranged from 20.3°C around 06:00 to 31.8°C around 17:00. 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
79th percentile
Low temperature
64th percentile
Rainfall
48th percentile
Wind
36th 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 25.8°C on this specific day.
Sun & daylight
Sunrise
07:22
Sunset
19:41
Day length
12h 19m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/New_York.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 04:00 | 22.4 | 25.6 | 0 | 1.5 | W | 93 | 1011 |
| 01:00 | 05:00 | 21.4 | 24.3 | 0 | 1.5 | WSW | 94 | 1011 |
| 02:00 | 06:00 | 21.2 | 24.1 | 0 | 1.4 | SW | 95 | 1011 |
| 03:00 | 07:00 | 21.1 | 24 | 0 | 1.3 | SW | 95 | 1011 |
| 04:00 | 08:00 | 20.7 | 23.2 | 0 | 1.7 | WSW | 95 | 1012 |
| 05:00 | 09:00 | 20.7 | 23.3 | 0 | 1.6 | WSW | 95 | 1012 |
| 06:00 | 10:00 | 20.3 | 23.6 | 0 | 0.4 | S | 96 | 1013 |
| 07:00 | 11:00 | 20.7 | 23.7 | 0 | 0.9 | SSE | 96 | 1013 |
| 08:00 | 12:00 | 20.7 | 23.7 | 0 | 1.2 | S | 96 | 1014 |
| 09:00 | 13:00 | 22.4 | 26.1 | 0 | 1.1 | S | 95 | 1014 |
| 10:00 | 14:00 | 24.5 | 28.2 | 0 | 1.4 | SW | 86 | 1014 |
| 11:00 | 15:00 | 28.8 | 31.7 | 0 | 2 | WSW | 63 | 1014 |
| 12:00 | 16:00 | 29.7 | 32.3 | 0.06 | 2.3 | WSW | 59 | 1014 |
| 13:00 | 17:00 | 30.8 | 33.2 | 0.01 | 2.3 | W | 55 | 1014 |
| 14:00 | 18:00 | 31 | 33.6 | 0 | 2.2 | W | 55 | 1013 |
| 15:00 | 19:00 | 31.4 | 34.3 | 0 | 2 | W | 55 | 1013 |
| 16:00 | 20:00 | 31.6 | 34.5 | 0 | 2 | W | 54 | 1012 |
| 17:00 | 21:00 | 31.8 | 34.4 | 0.01 | 2 | W | 52 | 1012 |
| 18:00 | 22:00 | 30.8 | 34.9 | 0.01 | 1.8 | WNW | 65 | 1012 |
| 19:00 | 23:00 | 29.7 | 33.8 | 0 | 1.9 | NNW | 69 | 1012 |
| 20:00 | 00:00 | 28.6 | 32 | 0 | 2 | NNW | 68 | 1012 |
| 21:00 | 01:00 | 27.9 | 30.9 | 0 | 2.2 | NNW | 69 | 1013 |
| 22:00 | 02:00 | 27 | 30.2 | 0 | 2.1 | N | 74 | 1014 |
| 23:00 | 03:00 | 24.2 | 27.7 | 0 | 1.8 | N | 88 | 1014 |
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
- Riverdale — 33.500°, -84.500°, ERA5 grid cell center, 11.4 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 17 September 2018 specifically — not a monthly average. See the Riverdale 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 (2026-07-16). Historical climate data for Riverdale, United States (33.50°N, 84.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Riverdale, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Riverdale, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Riverdale, 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/}
}Notice something wrong with this data? Report a data issue.