Home / Lake Forest / 17 May 2020
Lake Forest
United States · 17 May 2020
Average
9.7°C
low 7.9° · high 11.9°
Rainfall
80.3mm
rain recorded
Wind
6.7m/s
daily average
Humidity
94.3%
daily average
Cloud
100%
cover
Pressure
1010hPa
daily average
The temperature ranged from 7.9°C around 00:00 to 11.9°C around 17:00. Rain was recorded across 24 hours, from around 00:00 to 23:00 (80.3mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
39th percentile
Low temperature
40th percentile
Rainfall
100th percentile
Wind
87th 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 9.7°C on this specific day.
Sun & daylight
Sunrise
05:27
Sunset
20:08
Day length
14h 41m
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 | 7.9 | 3.2 | 0.36 | 5.6 | ENE | 90 | 1017 |
| 01:00 | 06:00 | 9 | 4.2 | 0.8 | 6.2 | E | 92 | 1016 |
| 02:00 | 07:00 | 9.6 | 4.2 | 1.49 | 7.2 | E | 91 | 1016 |
| 03:00 | 08:00 | 9.5 | 3.4 | 1.76 | 7.8 | E | 88 | 1015 |
| 04:00 | 09:00 | 9.3 | 2.8 | 1.98 | 8.3 | E | 87 | 1014 |
| 05:00 | 10:00 | 9.1 | 3.8 | 2.11 | 6.7 | E | 88 | 1014 |
| 06:00 | 11:00 | 9 | 3.5 | 2.95 | 6.9 | ESE | 89 | 1013 |
| 07:00 | 12:00 | 9 | 3.5 | 4.59 | 6.9 | ESE | 90 | 1013 |
| 08:00 | 13:00 | 8.9 | 3.4 | 4.68 | 7.1 | ESE | 91 | 1012 |
| 09:00 | 14:00 | 8.9 | 2.9 | 2.55 | 7.8 | ESE | 92 | 1012 |
| 10:00 | 15:00 | 8.9 | 2.7 | 2.45 | 8.1 | ESE | 93 | 1011 |
| 11:00 | 16:00 | 8.9 | 2.2 | 5.01 | 8.7 | ESE | 94 | 1010 |
| 12:00 | 17:00 | 9 | 2.3 | 3.78 | 8.9 | ESE | 95 | 1010 |
| 13:00 | 18:00 | 9.2 | 2.9 | 2.67 | 8.5 | SE | 96 | 1009 |
| 14:00 | 19:00 | 9.4 | 3.5 | 1.71 | 8.2 | SE | 97 | 1007 |
| 15:00 | 20:00 | 10.1 | 4.6 | 3.11 | 8 | SE | 99 | 1007 |
| 16:00 | 21:00 | 11 | 5.9 | 4.01 | 7.6 | SE | 98 | 1006 |
| 17:00 | 22:00 | 11.9 | 7.3 | 6.67 | 7.1 | SE | 96 | 1006 |
| 18:00 | 23:00 | 11.7 | 7.9 | 9.26 | 6.1 | SE | 99 | 1006 |
| 19:00 | 00:00 | 11.4 | 9 | 6.82 | 4 | ESE | 99 | 1006 |
| 20:00 | 01:00 | 10.8 | 7.8 | 2.75 | 4.7 | ENE | 100 | 1005 |
| 21:00 | 02:00 | 11.7 | 8.4 | 1.06 | 5.5 | ENE | 100 | 1005 |
| 22:00 | 03:00 | 10 | 7.8 | 2.03 | 3.3 | E | 100 | 1004 |
| 23:00 | 04:00 | 8.8 | 7.5 | 5.71 | 1.3 | SW | 99 | 1005 |
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 2020 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.