Temperature, Frost-Freeze Probabilities

Making Gardening Decisions Using Historical Temperature Data

Last Spring/First Fall Freeze-Frost Date Probabilities

Spring Frost-Free Dates

Plant Hardiness Zone Map
(United States Department of Agriculture)

Probability of Occurrence in the Spring and Fall of Selected Low Temperatures
(Climate of Minnesota Series - Part I, 1963)

The Agricultural and Minimum-Temperature-Free Seasons
(Climate of Minnesota Series - Part II, 1963)

Corn Growing Degree Day Normals

Normal Temperature Maps
(PRISM Climate Group, Oregon State University)

Normal Temperatures (1951-1980) and Their Application
(Climate of Minnesota Series - Part XV, 1985)

Calculated and Measured Air and Soil Freeze-Thaw Frequencies
(Journal of Applied Meteorology, 1995)

Frequency, Duration, Commencement Time and Intensity of Temperature Inversions at St. Paul-Minneapolis