Frequently Asked Questions
How is rainfall most accurately measured?
The World Meteorological Society recommends that weather stations are placed at a distance away from any nearby obstacles that is at least six times the height of the obstacles as the most optimal way to ensure accurate readings, this can prove impossible on a lot of orchards and farms due to space requirements so some compromise may be required.
The rain gauge needs to be level to operates accurately. There is a bubble level built into the base of your rain gauge you can use this to help with leveling.
Also see info on rain gauge choice
Which rain gauge should I choose?
Davis - The Davis rain gauge is our entry level offering. The gauge uses a self-emptying tipping spoon type mechanism with a clip in filter to reduce blockages and provision for optional bird spikes
Harvest - The Harvest rain gauge has been designed with a larger 203mm diameter catchment funnel, has a sturdy stainless steel construction and a large stainless steel sieve type filter and is factory calibrated with extra calibration check at Harvest.
Hyquest TB series - The TB Series is designed for industrial/meteorological purposes where a very high accuracy of measurement is required.
How often should I clean my rain gauge?
Your rain gauge should be cleared of debris at least every 6 months and vegetation or other obstructing objects kept at a reasonable distance. Clean cobwebs and insects from inside the bucket, clean the tipping bucket and check that it tips freely with very little force i.e. you should be able to blow on it to make it tip.
We have found that placing a Harvest insect repellent inside of the rain gauge can help prevent insects living inside the rain gauge.
Why is my neighbours rain gauge reading different to mine?
Rain gauges a even few metres apart at a similar level can differ by 10 percent as the capture area of a rain gauge is not large enough to cope with the statistical variation of rainfall. To try and overcome this variation very accurate scientific rain gauges have been made that have a capture diameter of one metre which is impractical for normal use. It is also important to note that the higher the rain gauge is mounted off the ground the less rain it will read due to be affected by wind.