Home / Altamont / 25 May 2016

Altamont

United States · 25 May 2016

AltamontUnited States12:13 AM localChange location

← 24 May 201626 May 2016 →

Average

12.1°C

low 6.6° · high 18.8°

Rainfall

0.3mm

dry day

Wind

2.6m/s

daily average

Humidity

61.8%

daily average

Cloud

44%

cover

Pressure

1017hPa

daily average

The temperature ranged from 6.6°C around 06:00 to 18.8°C around 18:00. 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

29th percentile

Low temperature

48th percentile

Rainfall

71th percentile

Wind

64th 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 13.7°C, versus 12.1°C on this specific day.

Sun & daylight

Sunrise

05:36

Sunset

20:31

Day length

14h 55m

Hour by hour

Temperature (line) and hourly rainfall (bars), local time — America/Los_Angeles.

↓ Download CSV
00:0006:0012:0018:0023:00

Cumulative rainfall through the day.

00:0006:0012:0018:0023:00
Local timeUTCTemp °CFeels °CRain mmWind m/sDirHumidity %Pressure hPa
00:0007:009.37.201.7WNW801016
01:0008:007.85.801.4WNW841016
02:0009:007.85.901.4WNW871016
03:0010:007.45.301.6WNW901016
04:0011:006.94.601.8WNW901017
05:0012:006.64.301.7WNW901017
06:0013:006.64.501.4NW921018
07:0014:007.55.401.6WNW891019
08:0015:0010.57.902.1WNW691019
09:0016:0011802.4WNW631018
10:0017:0013.31002.6NW481018
11:0018:0014.410.80.012.8NW441018
12:0019:0015.211.40.023.3NW431017
13:0020:001510.90.093.5NW411017
14:0021:0016.411.90.083.9NW361017
15:0022:0017.613.60.063.3NW341017
16:0023:0018.4140.033.9NW321016
17:0000:0018.613.90.034.1NNW301016
18:0001:0018.814.204.1NNW321016
19:0002:0017.513.40.013.6NW361016
20:0003:0014.411.103WNW531017
21:0004:00129.102.7WNW641018
22:0005:009.67.202WNW751019
23:0006:008.4601.9WNW811019

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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
Altamont — 42.250°, -121.750°, ERA5 grid cell center, 4.9 km from requested point
Time zone
America/Los_Angeles
What's shown here
The hourly and daily record for 25 May 2016 specifically — not a monthly average. See the Altamont 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

Plain text
PastClimate (2026-07-17). Historical climate data for Altamont, United States (42.25°N, 121.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
APA
PastClimate. (2026). Historical climate data for Altamont, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
MLA
"Historical Climate Data for Altamont, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
BibTeX
@misc{pastclimate,
  author = {PastClimate},
  title = {Historical climate data for Altamont, 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/}
}

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