Helena Climate Shift Score
Montana · US States · Climate Shift score
This page ranks Helena's own 50 year weather trend against every other live world capital, using the same full-record regression already shown on its Meteo Future Trends page. For where that trend has already gone, see the Climate Capitals trend history, or for current and historical day-to-day weather, see Meteo Capital Cities.See the full ranking of all live world capitals on the interactive map.
Score based on complete years through 2025.
Frequently asked questions about Helena's Climate Shift Index score
How fast is Helena's climate changing compared to other capitals?
Helena ranks 117 of 245 world capitals for how fast its climate is shifting. That places the city in the middle of the ranking. The ranking measures pace of change, not how hot or how pleasant a city is.
What is changing fastest in Helena?
The fastest-shifting variable in Helena is precipitation, at -45 mm/decade. That is the change per decade, fitted as a linear trend across 1976 to 2025, so over 50 years of measured data rather than two isolated years.
How much is Helena warming per decade?
Helena is warming at +0.31°C/decade across 1976 to 2025. Over thirty years that works out at roughly 0.9°C. The trend accounts for 15% of the variation between years; the rest is ordinary year-to-year swing.
Is Helena getting more extreme heat days?
Days above 30°C are increasing by +4.1 days/decade in Helena. On this trend that is roughly 12 days gained or lost every thirty years.
Is Helena losing its winter?
Frost days are declining by -0.0 days/decade in Helena. Frost days are often the fastest-shifting variable in this dataset: cold extremes tend to warm faster than hot ones, which bears directly on anything sized for a cold season.
What does Helena's Climate Shift Index score actually mean?
The score folds six variables (temperature, tropical days, frost days, precipitation, sunshine hours and wind speed) into one number, converting each into a percentile against every other ranked capital. Helena scores 51.2. A low score does not mean nothing is changing, only that other capitals are shifting faster, and the score says nothing about how liveable or how warm a city is.
