Home / Lake Forest / 17 May 2018
Lake Forest
United States · 17 May 2018
Average
9.1°C
low 7.4° · high 12.4°
Rainfall
0mm
dry day
Wind
5m/s
daily average
Humidity
84.3%
daily average
Cloud
65%
cover
Pressure
1018hPa
daily average
The temperature ranged from 7.4°C around 20:00 to 12.4°C around 05:00. 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
47th percentile
Low temperature
31th percentile
Rainfall
42th percentile
Wind
60th 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 11°C, versus 9.1°C on this specific day.
Sun & daylight
Sunrise
05:27
Sunset
20:07
Day length
14h 40m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 11.2 | 8.7 | 0 | 3.2 | SSW | 86 | 1015 |
| 01:00 | 06:00 | 11.6 | 9.1 | 0 | 3.2 | SSW | 84 | 1015 |
| 02:00 | 07:00 | 11.8 | 9.5 | 0 | 3 | SW | 81 | 1015 |
| 03:00 | 08:00 | 11.8 | 9.6 | 0 | 2.6 | WSW | 81 | 1015 |
| 04:00 | 09:00 | 11.5 | 9.5 | 0 | 2.3 | W | 83 | 1015 |
| 05:00 | 10:00 | 12.4 | 10.4 | 0 | 2.2 | WSW | 75 | 1016 |
| 06:00 | 11:00 | 11.9 | 10.2 | 0 | 1.7 | W | 77 | 1016 |
| 07:00 | 12:00 | 10.6 | 7.9 | 0 | 3.2 | N | 83 | 1016 |
| 08:00 | 13:00 | 8.9 | 4.3 | 0 | 5.5 | NNE | 87 | 1017 |
| 09:00 | 14:00 | 7.8 | 3 | 0 | 5.4 | NNE | 89 | 1018 |
| 10:00 | 15:00 | 7.6 | 3.1 | 0 | 4.9 | N | 86 | 1019 |
| 11:00 | 16:00 | 7.7 | 3.3 | 0 | 4.8 | N | 86 | 1019 |
| 12:00 | 17:00 | 7.9 | 3.4 | 0 | 5 | N | 85 | 1019 |
| 13:00 | 18:00 | 7.8 | 2.6 | 0 | 5.9 | N | 86 | 1019 |
| 14:00 | 19:00 | 7.7 | 1.6 | 0 | 7.2 | NNE | 87 | 1019 |
| 15:00 | 20:00 | 7.6 | 1.2 | 0 | 7.7 | NNE | 87 | 1019 |
| 16:00 | 21:00 | 7.7 | 1.3 | 0 | 7.8 | NNE | 86 | 1019 |
| 17:00 | 22:00 | 7.6 | 2.1 | 0 | 6.3 | N | 85 | 1018 |
| 18:00 | 23:00 | 7.6 | 2 | 0 | 6.4 | N | 84 | 1018 |
| 19:00 | 00:00 | 7.5 | 1.8 | 0 | 6.5 | N | 84 | 1019 |
| 20:00 | 01:00 | 7.4 | 1.6 | 0 | 6.7 | NNE | 84 | 1019 |
| 21:00 | 02:00 | 7.7 | 2.1 | 0 | 6.5 | NNE | 85 | 1019 |
| 22:00 | 03:00 | 8.5 | 3.4 | 0 | 6.1 | NNE | 86 | 1019 |
| 23:00 | 04:00 | 9.5 | 4.9 | 0 | 5.5 | NE | 84 | 1019 |
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
- Lake Forest — 42.250°, -87.750°, ERA5 grid cell center, 7.5 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 17 May 2018 specifically — not a monthly average. See the Lake Forest 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 Lake Forest, United States (42.25°N, 87.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Lake Forest, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Lake Forest, 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 Lake Forest, 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.