Boulder
United States · 16 May 2016
Average
4.6°C
low 1.7° · high 6.5°
Rainfall
17.8mm
rain recorded
Wind
2.3m/s
daily average
Humidity
95.3%
daily average
Cloud
97%
cover
Pressure
1014hPa
daily average
The temperature ranged from 1.7°C around 23:00 to 6.5°C around 09:00. Rain was recorded across 18 hours, from around 01:00 to 23:00 (17.7mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
7th percentile
Low temperature
20th percentile
Rainfall
96th percentile
Wind
79th 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 10.4°C, versus 4.6°C on this specific day.
Sun & daylight
Sunrise
05:44
Sunset
20:10
Day length
14h 27m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Denver.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 6.1 | 4.3 | 0.03 | 1.1 | W | 95 | 1011 |
| 01:00 | 07:00 | 5.8 | 4.1 | 0.3 | 0.7 | WNW | 93 | 1011 |
| 02:00 | 08:00 | 5.4 | 3.6 | 0.14 | 0.7 | WNW | 91 | 1010 |
| 03:00 | 09:00 | 5.3 | 3.5 | 0 | 0.7 | WNW | 90 | 1009 |
| 04:00 | 10:00 | 5.1 | 2.6 | 0 | 1.8 | WSW | 96 | 1009 |
| 05:00 | 11:00 | 4.8 | 2.5 | 0 | 1.4 | W | 96 | 1009 |
| 06:00 | 12:00 | 5.2 | 3 | 0.01 | 1.2 | WNW | 93 | 1009 |
| 07:00 | 13:00 | 5.4 | 3.3 | 0.07 | 1.1 | NNW | 93 | 1010 |
| 08:00 | 14:00 | 5.8 | 3.4 | 0.57 | 1.8 | NNE | 94 | 1012 |
| 09:00 | 15:00 | 6.5 | 3.9 | 1.4 | 2.2 | NE | 93 | 1012 |
| 10:00 | 16:00 | 6.2 | 3.4 | 0.92 | 2.8 | NE | 99 | 1012 |
| 11:00 | 17:00 | 6.1 | 2.7 | 1.33 | 3.5 | ENE | 98 | 1012 |
| 12:00 | 18:00 | 5.8 | 1.7 | 2.09 | 4.5 | ENE | 98 | 1012 |
| 13:00 | 19:00 | 5 | 0.9 | 1.04 | 4.2 | ENE | 98 | 1013 |
| 14:00 | 20:00 | 4.5 | 0.3 | 1.55 | 4.1 | NE | 96 | 1014 |
| 15:00 | 21:00 | 4.5 | 0.3 | 1.47 | 4 | NE | 93 | 1015 |
| 16:00 | 22:00 | 4 | -0.6 | 1.42 | 4.5 | NE | 97 | 1016 |
| 17:00 | 23:00 | 3.6 | -0.8 | 1.16 | 4 | ENE | 93 | 1018 |
| 18:00 | 00:00 | 3.6 | 0.1 | 0.83 | 2.8 | NE | 94 | 1019 |
| 19:00 | 01:00 | 3.1 | 0.1 | 0.76 | 2 | NNE | 96 | 1021 |
| 20:00 | 02:00 | 2.7 | -0.3 | 0.76 | 1.9 | NNE | 99 | 1021 |
| 21:00 | 03:00 | 1.9 | -1 | 0.64 | 1.8 | NNE | 99 | 1023 |
| 22:00 | 04:00 | 1.9 | -1 | 0.7 | 1.6 | NNE | 98 | 1024 |
| 23:00 | 05:00 | 1.7 | -1.1 | 0.56 | 1.4 | N | 96 | 1024 |
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 — 40.000°, -105.250°, ERA5 grid cell center, 2.4 km from requested point
- Time zone
- America/Denver
- What's shown here
- The hourly and daily record for 16 May 2016 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 (2026-07-17). Historical climate data for Boulder, United States (40.00°N, 105.25°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 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Boulder, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 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 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.