Weather for Geeks

Station telemetry, instrumentation, historical data and assorted atmospheric geekery

Station data updated: 09:30 PM · September 20, 2026

Jump to: Atmosphere · Wind · Rainfall · Solar & UV · Sun & Moon · History · Station · Oddities

Atmospheric Parameters

Measurements and derived atmospheric values

Dew Point

67.4°F

Heat Index

96.5°F

Barometric Pressure

29.768 inHg

3-hour change -0.081 inHg

Wind

Current and short-term wind behavior

Current Wind

6 mph

SSW (207°)

Current Gust

11 mph

SSW

10-Minute Average

5 mph

Average wind speed · last 10 minutes

10-Minute Peak

11 mph

Peak gust · last 10 minutes

Rainfall

Because every hundredth of an inch matters in the Hill Country

Today

0.00 in

Yesterday

0.00 in

Month

0.00 in

Year

23.86 in

Solar & UV

Solar radiation and ultraviolet observations

Solar Radiation

537 W/m²

Strong

Weak Moderate Strong Very Strong Intense

Current solar irradiance level

UV Index

4.1

—

Low Moderate High Very High Extreme

Sun exposure risk level

THSW Index

N/A

Calculated locally

Sun & Moon Almanac

Solar and lunar events calculated for the Harper weather station

Sun

Start Civil Twilight 12:00:01 PM

Sunrise 12:24:34 PM

Solar Noon 06:30:39 PM

Sunset 12:37:32 AM

End Civil Twilight 01:02:04 AM

Azimuth 243.9°

Altitude 38.3°

Declination 0.8°

Next Equinox 09/23/2026 12:05:09 AM

Next Solstice 12/21/2026 08:49:59 PM

Moon

Moonrise 09:11:05 PM

Transit 01:27:01 AM

Moonset 06:28:43 AM

Azimuth 122.0°

Altitude 2.8°

Declination -25.8°

Phase Waxing gibbous

Illumination 69% full

Next New Moon 10/10/2026 03:50:01 PM

Next Full Moon 09/26/2026 04:48:57 PM

Historical Weather

Harper station history, trends and climatological summaries

Temperature History

Harper temperature and dew point history

Rainfall History

Wind History

Pressure History

Monthly Climatological Summaries

Daily temperature, rainfall, wind and degree-day observations

Reports are generated from the Harper WeeWX archive. The current month's report is updated as new observations are added to the database.

Current Year

YTD High

101.5°F

Aug 27, 2026

YTD Low

11.6°F

Jan 25, 2026

YTD Rain

23.86 in

Through Sep 20

Highest Wind

40 mph

Feb 14, 2026

Climatological Report Archive

Select a month for the complete daily report

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Earlier Years

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View report inventory

Station & Instrumentation

The hardware behind the numbers

Weather Receiver

WeatherLink Live

Local network acquisition

Network Switch Temperature: 80.7°F

Network Switch Humidity: 31%

Wind

Davis Vantage Pro2

Transmitter 1

Battery: OK

Temperature / Humidity / Rain

Davis Vantage Pro2

Transmitter 2

Battery: OK

Weather Software

WeeWX 5.5.0

Harper weather server
Custom design by John Canfield
Coding assistance by ChatGPT

Weather Oddities & Geek Calculations

Interesting numbers that nobody actually needs — which is precisely why they belong here

Weather Server Uptime —

CPU Temperature —

WeeWX Service Uptime —

System Load —

Disk Space Available —

Last Weather Archive —

Current Distance to Mars —