Ottawa
United States · 23 June 2018
Average
20.6°C
low 17.5°C · high 23.3°C
Rainfall
0.5mm
dry day
Wind
1.7m/s
daily average
Humidity
78.3%
daily average
Cloud
90%
cover
Pressure
1008hPa
daily average
The temperature ranged from 17.5°C around 05:00 to 23.3°C around 16:00. Rain was recorded across 2 hours, from around 01:00 to 13:00 (0.5mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
4th percentile
Low temperature
35th percentile
Rainfall
53th percentile
Wind
4th 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 24.1°C, versus 20.6°C on this specific day.
Sun & daylight
Sunrise
05:22
Sunset
20:31
Day length
15h 9m
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 | 18.4°C | 18.9°C | 0 | 2.1 | NNE | 86 | 1007 |
| 01:00 | 06:00 | 18.5°C | 19.3°C | 0.1 | 1.9 | NNE | 87 | 1006 |
| 02:00 | 07:00 | 18.4°C | 19.4°C | 0 | 1.5 | NNW | 87 | 1007 |
| 03:00 | 08:00 | 18.3°C | 19°C | 0.02 | 1.9 | WNW | 88 | 1007 |
| 04:00 | 09:00 | 18.3°C | 18.7°C | 0.06 | 2.4 | WNW | 88 | 1007 |
| 05:00 | 10:00 | 17.5°C | 17.5°C | 0.03 | 2.4 | WNW | 85 | 1007 |
| 06:00 | 11:00 | 17.6°C | 17.9°C | 0 | 1.9 | NNW | 85 | 1007 |
| 07:00 | 12:00 | 17.8°C | 18.6°C | 0 | 1.3 | NW | 85 | 1007 |
| 08:00 | 13:00 | 18°C | 18.8°C | 0 | 1.4 | W | 86 | 1008 |
| 09:00 | 14:00 | 18.2°C | 18.8°C | 0.01 | 2 | W | 88 | 1009 |
| 10:00 | 15:00 | 20°C | 20.5°C | 0.02 | 1.6 | NNW | 74 | 1008 |
| 11:00 | 16:00 | 20.7°C | 21.5°C | 0 | 1.7 | NNE | 75 | 1007 |
| 12:00 | 17:00 | 21.8°C | 23.5°C | 0.05 | 0.5 | NNE | 70 | 1008 |
| 13:00 | 18:00 | 23°C | 24.7°C | 0.12 | 0.4 | NE | 66 | 1008 |
| 14:00 | 19:00 | 23.1°C | 25.1°C | 0.02 | 0.4 | SW | 69 | 1008 |
| 15:00 | 20:00 | 23.2°C | 24.4°C | 0.07 | 1.7 | W | 69 | 1008 |
| 16:00 | 21:00 | 23.3°C | 24.3°C | 0 | 1.8 | WNW | 67 | 1008 |
| 17:00 | 22:00 | 23.3°C | 24.1°C | 0.01 | 2.3 | W | 69 | 1008 |
| 18:00 | 23:00 | 23°C | 24.3°C | 0 | 1.8 | WSW | 71 | 1007 |
| 19:00 | 00:00 | 22.4°C | 24.4°C | 0 | 1.2 | WSW | 76 | 1008 |
| 20:00 | 01:00 | 22.5°C | 23.6°C | 0 | 1.7 | SW | 72 | 1008 |
| 21:00 | 02:00 | 22.5°C | 23.7°C | 0 | 2.2 | SW | 76 | 1009 |
| 22:00 | 03:00 | 21.8°C | 23.2°C | 0 | 2.4 | SW | 82 | 1009 |
| 23:00 | 04:00 | 21.8°C | 23.1°C | 0.02 | 2.2 | WSW | 80 | 1009 |
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
- Ottawa — 41.250°, -88.750°, ERA5 grid cell center, 13.1 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 23 June 2018 specifically — not a monthly average. See the Ottawa 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 (2026-07-21). Historical climate data for Ottawa, United States (41.25°N, 88.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Ottawa, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Ottawa, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Ottawa, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.