Hot-summer humid continental climate (Dfa)

Hot-summer humid continental climate (Dfa)

Dfa: D = Snow  f = Fully humid a = Hot summer


Hot-summer humid continental climate; coldest month averaging below 0 °C, at least one month's average temperature above 22 °C, and at least four months averaging above 10 °C. No significant precipitation difference between seasons.

Examples of airports with a Dfa climate include St Louis/Lambert, Illinois, USA, Kherson, Ukraine, and New Chitose Airport, Japan

Climate map showing regions with Humid continental climates: hot summer subtype

Köppen–Geiger climate classification map for Humid continental climates: Hot summer subtype (Dfa, Dwa, Dsa) - source: wikicommons, authors:  Beck, H.E., Zimmermann, N. E., McVicar, T. R., Vergopolan, N., Berg, A., & Wood, E. F., 2018

Flight safety and planning considerations

Snow fall and risk of runway contamination and airframe icing in winter months. Performance limitations in high summer temperatures.

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