Home / Harvard / 13 September 2017
Harvard
United States · 13 September 2017
← 12 September 201714 September 2017 →
Average
17.7°C
low 10.6°C · high 24.8°C
Rainfall
0mm
dry day
Wind
2.1m/s
daily average
Humidity
78.1%
daily average
Cloud
2%
cover
Pressure
1008hPa
daily average
The temperature ranged from 10.6°C around 06:00 to 24.8°C around 14:00. 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
44th percentile
Low temperature
11th percentile
Rainfall
47th percentile
Wind
21th 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 19.3°C, versus 17.7°C on this specific day.
Sun & daylight
Sunrise
06:32
Sunset
19:06
Day length
12h 35m
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 | 12.7°C | 11.4°C | 0 | 2.2 | ENE | 87 | 1010 |
| 01:00 | 06:00 | 12.6°C | 11.3°C | 0 | 2.2 | ENE | 89 | 1010 |
| 02:00 | 07:00 | 12.4°C | 11.3°C | 0 | 2 | ENE | 90 | 1010 |
| 03:00 | 08:00 | 12.7°C | 11.8°C | 0 | 1.9 | NE | 92 | 1010 |
| 04:00 | 09:00 | 12.5°C | 11.7°C | 0 | 1.8 | NE | 94 | 1009 |
| 05:00 | 10:00 | 10.9°C | 9.9°C | 0 | 1.9 | NNE | 99 | 1009 |
| 06:00 | 11:00 | 10.6°C | 9.4°C | 0 | 1.9 | N | 99 | 1009 |
| 07:00 | 12:00 | 11.7°C | 10.9°C | 0 | 1.7 | N | 98 | 1009 |
| 08:00 | 13:00 | 13.6°C | 13.1°C | 0 | 2.1 | N | 98 | 1010 |
| 09:00 | 14:00 | 16.4°C | 16.9°C | 0 | 1.9 | N | 95 | 1009 |
| 10:00 | 15:00 | 20.5°C | 20°C | 0 | 2.1 | NNE | 63 | 1009 |
| 11:00 | 16:00 | 22.5°C | 22°C | 0 | 2.2 | NE | 55 | 1008 |
| 12:00 | 17:00 | 23.9°C | 23.2°C | 0 | 2.3 | NE | 50 | 1008 |
| 13:00 | 18:00 | 24.6°C | 23.9°C | 0 | 2.3 | ENE | 48 | 1007 |
| 14:00 | 19:00 | 24.8°C | 24.2°C | 0 | 2.2 | ENE | 48 | 1007 |
| 15:00 | 20:00 | 24.8°C | 24.1°C | 0 | 2.2 | E | 47 | 1006 |
| 16:00 | 21:00 | 24.3°C | 23.5°C | 0 | 2.4 | E | 49 | 1006 |
| 17:00 | 22:00 | 23.9°C | 24.6°C | 0 | 2.5 | ESE | 65 | 1007 |
| 18:00 | 23:00 | 22.5°C | 23.1°C | 0 | 2.4 | ESE | 70 | 1007 |
| 19:00 | 00:00 | 20.3°C | 20.5°C | 0 | 2.2 | ESE | 74 | 1008 |
| 20:00 | 01:00 | 18.4°C | 18.2°C | 0 | 2.5 | ESE | 80 | 1008 |
| 21:00 | 02:00 | 17.3°C | 17.3°C | 0 | 2.3 | SE | 86 | 1008 |
| 22:00 | 03:00 | 15.6°C | 16.2°C | 0 | 1.8 | SE | 100 | 1009 |
| 23:00 | 04:00 | 14.8°C | 15.1°C | 0 | 1.7 | SSE | 100 | 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
- Harvard — 42.500°, -88.500°, ERA5 grid cell center, 12.7 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 13 September 2017 specifically — not a monthly average. See the Harvard 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 Harvard, United States (42.50°N, 88.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Harvard, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Harvard, 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 Harvard, 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.