Delta County Climate

Name: Delta County Climate Normals
Creator: NOAA National Centers for Environmental Information
License: https://www.usa.gov/government-works

Delta County, Texas

NOAA NCEI 1991-2020 Climate Normals

Avg Annual Temp

64.8°F

Annual Precip

47.9"

Annual Snowfall

—

Extreme Heat Days

days >= 90°F/yr

Monthly Temperature

Precipitation Calendar

Dry

Wet

3.3"

3.5"

4.4"

4.2"

4.6"

4.2"

3.2"

3.0"

3.1"

5.3"

4.5"

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Growing Season & Gardening

USDA Hardiness Zone

Minimum winter temperature range for plant survival

Seasonal Overview

National Comparison

Warmer than 86% of US counties

Wetter than 68% of US counties

More seasonal variation than 34% of US counties

7-Day Outlook

Forecast

Current Conditions

Air Quality

Safety

Weather Alerts

Climate Advisory: Delta County

Climate Verdict

Delta County has a warm, averaging 64.8°F year-round, moderately wet with 47.9 inches of annual precipitation, significant summer heat with 92.45 days annually above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.

Seasonal Breakdown

Winters are mild, with January temperatures averaging 44.3°F. summers are hot, with July averaging 83.9°F. The 40°F seasonal variation provides noticeable but manageable change.

Outdoor & Gardening Guidance

Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.

Regional Context

Delta County closely matches the Texas statewide average temperature of 65.5°F, it is also noticeably wetter, receiving 16.0 inches more precipitation than the state average.

Frequently Asked Questions

What is the average temperature in Delta County?

The average annual temperature in Delta County, TX is 64.8°F, based on NOAA 30-year climate normals (1991-2020).

How much rain does Delta County get?

Delta County receives an average of 47.9 inches of precipitation per year, including both rain and meltwater from snow. This is based on NOAA 30-year climate normals.

How hot does Delta County get in summer?

The average summer temperature (June-August) in Delta County is 82.5°F. The county experiences an average of 92 days per year above 90°F.

How cold are winters in Delta County?

The average winter temperature (December-February) in Delta County is 46.5°F. January, typically the coldest month, averages 44.3°F.

Track your own weather in Delta County

Ambient Weather personal weather stations give you hyperlocal climate data.

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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.

Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.

By Evan Brooks, Data EditorUpdated May 14, 2026Reviewed by Evan Brooks, Data Editor

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