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Glacier National Park

Daily park-wide climate series from 1980 to 2025, reduced from DAYMET v4 + ERA5-Land over the real PAD-US 4.1 park boundary.

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Annual mean temperature · 1980–2025
Cooler than 1981–2010 baseline Near baseline Warmer than 1981–2010 baseline
19802025

Headline trends

Theil–Sen slope estimates with Mann–Kendall p-values. Trends marked ✓ are statistically significant at the 95% level.

Mean temperature
+0.030°F / yr not sig.
Total +1.34 °F since 1980 · p = 0.058
Maximum temperature
+0.022°F / yr not sig.
Total +0.99 °F since 1980 · p = 0.233
Minimum temperature
+0.100°F / yr significant
Total +4.50 °F since 1980 · p < 0.001
Precipitation
+1.62mm / yr² not sig.
Total +73.11 mm since 1980 · p = 0.596

Time series & trends

Every variable in the dataset, with its Theil–Sen slope and Mann–Kendall p-value. Click any row to open the annual time series, a 12-month rolling trend (long-term direction without the annual cycle), and a togglable seasonal climatology for three 15-year periods so the shift in seasonal pattern is visible.

Mean temperature +0.030 °F / yr +1.34 p = 0.058 not sig.

Annual mean of daily mean near-surface temperature.

Annual mean temperature (°F) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Maximum temperature +0.022 °F / yr +0.99 p = 0.233 not sig.

Annual mean of daily maximum near-surface temperature.

Annual maximum temperature (°F) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Minimum temperature +0.100 °F / yr +4.50 p < 0.001 sig.

Annual mean of daily minimum near-surface temperature.

Annual minimum temperature (°F) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Precipitation +1.62 mm / yr² +73.11 p = 0.596 not sig.

Annual total precipitation.

Annual precipitation (mm / yr) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Actual evapotranspiration -0.18 mm / yr² -8.02 p = 0.691 not sig.

Annual total actual evapotranspiration (ERA5-Land).

Annual actual evapotranspiration (mm / yr) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Potential evapotranspiration +9.62 mm / yr² +433.05 p = 0.008 sig.

Annual total potential evapotranspiration (ERA5-Land).

Annual potential evapotranspiration (mm / yr) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Snow cover +0.02 % / yr +1.07 p = 0.636 not sig.

Mean daily snow-cover fraction.

Annual snow cover (%) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Snow depth (water-equivalent) -0.14 mm / yr -6.18 p = 0.895 not sig.

Mean daily snow depth expressed as water equivalent.

Annual snow depth (water-equivalent) (mm) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Snowfall (water-equivalent) +0.70 mm / yr² +31.59 p = 0.460 not sig.

Annual total water-equivalent snowfall.

Annual snowfall (water-equivalent) (mm / yr) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Snowmelt +0.29 mm / yr² +13.15 p = 0.748 not sig.

Annual total snowmelt.

Annual snowmelt (mm / yr) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Shortwave radiation -0.22 W/m² / yr -9.72 p = 0.129 not sig.

Mean daily downwelling shortwave radiation.

Annual shortwave radiation (W/m²) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Snow-water equivalent -0.81 mm / yr -35.49 p = 0.314 not sig.

Mean daily snow-water equivalent.

Annual snow-water equivalent (mm) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Vapour pressure +1.9 Pa / yr +82.70 p < 0.001 sig.

Mean daily near-surface water-vapour pressure.

Annual vapour pressure (Pa) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle
Wind speed -0.000 m/s / yr -0.00 p = 0.985 not sig.

Mean daily 10-m wind speed.

Annual wind speed (m/s) (Theil–Sen)
Long-term trend (12-month rolling)
Seasonal cycle

Download the data

Everything is open-licensed (MIT). The first two buttons fetch just this park; the third pulls the bulk daily CSV archive from Zenodo, which contains the raw daily series for all 63 parks (≈150 MB).

JSON · this park Summary JSON Annual + seasonal aggregates, MK / Theil–Sen trends, monthly decomposition, climate stripes. GeoJSON · this park Boundary GeoJSON PAD-US 4.1 proclamation polygon, dissolved, simplified to 50 m, in WGS84. Zenodo · all 63 parks Daily CSVs (bulk, ~150 MB) Raw 1980–2025 daily series for every park, gzipped. Use nps.fetch_daily("glacier") if you only want this one — see the Data page.

Cite this park

Britton, A., & Pritchard, I. (2026). Glacier National Park climate series, in NPS Open Climate Data v1.0.0 [Data set]. Zenodo. https://doi.org/10.5281/zenodo.19823584