Boulder
United States · 14 June 2018
Average
13.1°C
low 8.5°C · high 17.9°C
Rainfall
1.4mm
rain recorded
Wind
3.2m/s
daily average
Humidity
58.6%
daily average
Cloud
36%
cover
Pressure
1007hPa
daily average
The temperature ranged from 8.5°C around 23:00 to 17.9°C around 17:00. Rain was recorded across 5 hours, from around 07:00 to 12:00 (1.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
33th percentile
Low temperature
71th percentile
Rainfall
55th percentile
Wind
90th 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 13.1°C, versus 13.1°C on this specific day.
Sun & daylight
Sunrise
05:35
Sunset
21:21
Day length
15h 46m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Denver.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 12.6°C | 10.3°C | 0 | 2.1 | NW | 65 | 1005 |
| 01:00 | 07:00 | 11.9°C | 9.6°C | 0 | 2.2 | NW | 70 | 1004 |
| 02:00 | 08:00 | 11.7°C | 9.5°C | 0 | 2.1 | WNW | 73 | 1004 |
| 03:00 | 09:00 | 10.6°C | 8.3°C | 0 | 2.2 | WNW | 77 | 1004 |
| 04:00 | 10:00 | 10.4°C | 8.1°C | 0 | 1.8 | WNW | 72 | 1004 |
| 05:00 | 11:00 | 9.8°C | 7.4°C | 0 | 1.9 | WNW | 73 | 1004 |
| 06:00 | 12:00 | 9.7°C | 7.2°C | 0.07 | 2 | WNW | 74 | 1005 |
| 07:00 | 13:00 | 10.1°C | 7.5°C | 0.27 | 2.6 | NW | 80 | 1006 |
| 08:00 | 14:00 | 11.1°C | 8.2°C | 0.24 | 3.1 | NW | 74 | 1007 |
| 09:00 | 15:00 | 12.7°C | 9.2°C | 0.29 | 4 | NW | 69 | 1008 |
| 10:00 | 16:00 | 13.5°C | 10.1°C | 0.21 | 4 | NW | 67 | 1009 |
| 11:00 | 17:00 | 14.1°C | 10.6°C | 0.06 | 4 | NW | 63 | 1009 |
| 12:00 | 18:00 | 14.7°C | 11°C | 0.15 | 4.3 | WNW | 59 | 1009 |
| 13:00 | 19:00 | 15.2°C | 11.1°C | 0.03 | 4.7 | WNW | 57 | 1009 |
| 14:00 | 20:00 | 16.2°C | 11.8°C | 0.07 | 4.9 | WNW | 50 | 1008 |
| 15:00 | 21:00 | 17.1°C | 12.2°C | 0.03 | 4.9 | WNW | 40 | 1008 |
| 16:00 | 22:00 | 17.5°C | 12.6°C | 0 | 4.8 | WNW | 37 | 1007 |
| 17:00 | 23:00 | 17.9°C | 13.1°C | 0 | 4.5 | WNW | 34 | 1007 |
| 18:00 | 00:00 | 17.1°C | 12.2°C | 0 | 4.3 | NW | 34 | 1008 |
| 19:00 | 01:00 | 16.4°C | 11.8°C | 0 | 4 | NW | 35 | 1008 |
| 20:00 | 02:00 | 15.1°C | 11.2°C | 0 | 3.1 | NW | 42 | 1009 |
| 21:00 | 03:00 | 11.7°C | 8.3°C | 0 | 2.3 | NNW | 49 | 1009 |
| 22:00 | 04:00 | 10.1°C | 6.8°C | 0 | 2 | NNW | 52 | 1010 |
| 23:00 | 05:00 | 8.5°C | 5.5°C | 0 | 1.9 | NNW | 62 | 1011 |
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
- Boulder — 46.250°, -112.000°, ERA5 grid cell center, 9.4 km from requested point
- Time zone
- America/Denver
- What's shown here
- The hourly and daily record for 14 June 2018 specifically — not a monthly average. See the Boulder 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 Boulder, United States (46.25°N, 112.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Boulder, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Boulder, 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 Boulder, 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.