Expand Helena Rgnl Ap, US Helena Rgnl Ap, US Helena Rgnl ApChange location Precipitation stripe Data sourcesLocation Warming anomaly — Heating score 0 Record high 1969 Recent observations View Climate stripe Add Chart all dataGrouping Year Year and month Month Day Axes Aggregation Grouping days Half-yearly Quarterly Monthly (28 days) Fortnightly Weekly Threshold (%) Override preset threshold Reset Download Change location