Frost Dates for Tulsa, Oklahoma, United States of America

Coordinates: 36.154, -95.993

Growing Season

The last spring air frost in Tulsa, Oklahoma, United States of America typically occurs around Mar 30, and the first autumn air frost around Oct 12. This gives a frost-free growing season of approximately 196 days.

USDA Hardiness Zone

This location falls in USDA Hardiness Zone 7b, where the average annual extreme minimum temperature is -15 to -12.2°C (5 to 10°F). This zone rating helps gardeners determine which perennial plants are likely to survive winter.

Temperature Overview

The coldest month is January, with an average low of -1°C (30°F). The warmest month is July, with an average high of 34°C (93°F).

Frost Risk Breakdown

Frost dates at three temperature thresholds: Air frost (0°C / 32°F): Mar 30 (last spring) to Oct 12 (first autumn). Light ground frost (-1°C / 30°F): Mar 12 (last spring) to Oct 22 (first autumn). Hard ground frost (-2°C / 28°F): Feb 19 (last spring) to Nov 13 (first autumn).

We predict your growing zone to be approximately ...

USDA Growing Zone: USDA Growing Zone - 7b

... and the frost data for your area is ...

Current Risk Level: Unlikely (Safest)

for today based on past data only.

We predict a frost free growing season at your location from Mar 30 to Oct 12, which provides approximately 195 frost free days.

For the less tender plants, or if you are planning to protect your plants with fleece etc, your growing season could stretch from Mar 12 to Oct 22, which provides a total of 224 days for growing.

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