Hot-summer humid continental climate (Dfa)
Hot-summer humid continental climate (Dfa)
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06.Jul.2023
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SKYbrary Aviation Safety. (July 6, 2023). Hot-summer humid continental climate (Dfa).
Retrieved June 4, 2026
from https://skybrary.aero/articles/hot-summer-humid-continental-climate-dfa
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Dfa: D = Snow f = Fully humid a = Hot summer
Description
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
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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