Home / Algonquin / 15 May 2018
Algonquin
United States · 15 May 2018
Average
17.3°C
low 11.6°C · high 21°C
Rainfall
0.4mm
dry day
Wind
3m/s
daily average
Humidity
75.6%
daily average
Cloud
80%
cover
Pressure
1014hPa
daily average
The temperature ranged from 11.6°C around 23:00 to 21°C around 12:00. Rain was recorded for one hour, around 00:00 (0.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
59th percentile
Low temperature
66th percentile
Rainfall
50th percentile
Wind
47th 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 15°C, versus 17.3°C on this specific day.
Sun & daylight
Sunrise
05:31
Sunset
20:07
Day length
14h 36m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 18.7°C | 20.7°C | 0.28 | 0.8 | W | 94 | 1010 |
| 01:00 | 06:00 | 18.5°C | 20°C | 0.05 | 1.5 | WNW | 95 | 1011 |
| 02:00 | 07:00 | 18.2°C | 19°C | 0.02 | 2.5 | WNW | 95 | 1010 |
| 03:00 | 08:00 | 18.2°C | 18.7°C | 0 | 2.8 | WNW | 96 | 1010 |
| 04:00 | 09:00 | 17.7°C | 18.3°C | 0 | 2.6 | NW | 96 | 1011 |
| 05:00 | 10:00 | 16.9°C | 17.5°C | 0 | 2.1 | NW | 95 | 1011 |
| 06:00 | 11:00 | 17°C | 17.7°C | 0 | 1.7 | NNE | 94 | 1012 |
| 07:00 | 12:00 | 17.3°C | 17.4°C | 0 | 2.6 | NNE | 91 | 1013 |
| 08:00 | 13:00 | 17.8°C | 17.5°C | 0 | 3.3 | NNE | 91 | 1014 |
| 09:00 | 14:00 | 18.5°C | 18.3°C | 0 | 2.9 | NNE | 83 | 1014 |
| 10:00 | 15:00 | 20.1°C | 19°C | 0 | 2.6 | NNE | 61 | 1015 |
| 11:00 | 16:00 | 20.9°C | 19.5°C | 0 | 3.1 | NNE | 59 | 1015 |
| 12:00 | 17:00 | 21°C | 19°C | 0 | 3.9 | NNE | 58 | 1015 |
| 13:00 | 18:00 | 20.1°C | 17.8°C | 0 | 4.4 | NE | 62 | 1015 |
| 14:00 | 19:00 | 19.1°C | 17°C | 0 | 4.3 | ENE | 67 | 1016 |
| 15:00 | 20:00 | 18.6°C | 16.6°C | 0 | 4.3 | NE | 71 | 1016 |
| 16:00 | 21:00 | 17.7°C | 15.3°C | 0 | 4.1 | NE | 68 | 1016 |
| 17:00 | 22:00 | 16.5°C | 14.2°C | 0 | 3.6 | NE | 67 | 1017 |
| 18:00 | 23:00 | 16.2°C | 13.6°C | 0 | 3.5 | NE | 64 | 1016 |
| 19:00 | 00:00 | 15.4°C | 12.6°C | 0 | 3.3 | NNE | 61 | 1016 |
| 20:00 | 01:00 | 14.5°C | 11.5°C | 0 | 3.2 | NNE | 58 | 1016 |
| 21:00 | 02:00 | 13.4°C | 10.1°C | 0 | 3.2 | NNE | 58 | 1017 |
| 22:00 | 03:00 | 11.9°C | 8.7°C | 0 | 3.3 | NNE | 66 | 1017 |
| 23:00 | 04:00 | 11.6°C | 8.4°C | 0 | 3 | NE | 66 | 1017 |
Nearby cities
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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
- Algonquin — 42.250°, -88.250°, ERA5 grid cell center, 10.1 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 15 May 2018 specifically — not a monthly average. See the Algonquin 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 Algonquin, United States (42.25°N, 88.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Algonquin, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Algonquin, 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 Algonquin, 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.