Stevenson Weather Data
The Stevenson screen is an enclosure for meteorological equipment invented by Thomas Stevenson. Over the years they have been modified to improve the reliability of the measurements taken within. There have been several different Stevenson screens at the site over the years. At one time there were even two, one of which housed a hydro-thermograph. As time goes on of course systems break down are too expensive to replace. This what happened to the Thermograph and the Stevenson screens since they were wooden designs fell to the elements and rotted away. You can now buy plastic ones which won't rot of course but will still eventually fall victim to the sun. Also more more modern ones have black interiors which we are told don't effect the readings.
You will find the weather averages recorded by the Stephenson screen in the tables below. The data was collected from 1955 onwards.
At the bottom of the page you find links to the averages since 1955 and 1981 - 2010 daily average temperatures.
This includes Humidity Maximum and Minimum temperatures. The humidity is recorded via a wet and dry bulb. Soil temperatures measured at one foot.
The Davis weather station also runs from midnight to midnight so this will show slight differences from the data measured from the Stevenson screen. Also note that digital respond quicker to temperatures changes so it's possible the Stevenson data may miss some peaks and troughs
A new set of Maximum, Minimum,Dry and Wet bulbs have been bought over the last couple of years. This means the Davis Maximum isn’t been used any longer. However the values tend to match the values recorded in the Stephenson screen. This allowed me to reconstruct some of the data that was missing from the 2004 data sets due to illness.I will be slowly adding further data sets although this a time consuming business.
Stevenson Screen Data and the Monthly Summaries from the Year 2000 onwards
| Stevenson Screen Data 2000 Onwards | ||
|---|---|---|
| Year | Year | Year |
| 1994 | 2006 | 2018 |
| 1995 | 2007 | 2019 |
| 1996 | 2008 | 2020 |
| 1997 | 2009 | 2021 |
| 1998 | 2010 | 2022 |
| 1999 | 2011 | 2023 |
| 2000 | 2012 | 2024 |
| 2001 | 2013 | 2025 |
| 2002 | 2014 | 2026 |
| 2003 | 2015 | 2027 |
| 2004 | 2016 | 2028 |
| 2005 | 2017 | 2029 |
Stevenson Screen Data and the Monthly Averages from the Year 2000 Onwards
| Stevenson Screen Monthly Averages 2000 Onwards | ||
|---|---|---|
| Year | Year | Year |
| 1994 | 2006 | 2018 |
| 1995 | 2007 | 2019 |
| 1996 | 2008 | 2020 |
| 1997 | 2009 | 2021 |
| 1998 | 2010 | 2022 |
| 1999 | 2011 | 2023 |
| 2000 | 2012 | 2024 |
| 2001 | 2013 | 2025 |
| 2002 | 2014 | 2026 |
| 2003 | 2015 | 2027 |
| 2004 | 2016 | 2028 |
| 2005 | 2017 | 2029 |
Weather Averages including Hottest, Coolest, Wettest and Driest Months 1955 Onwards
| Stevenson Screen Monthly Averages 2000 Onwards | |||
|---|---|---|---|
| Rainfall | Temperature | Average daily Temperatures | Winds speed and Gust |
| Rainfall | Maximum Temperature | Daily Average High 1981 - 2010 | Wind Speed 2002 Onwards |
| Minimum Temperature | Daily Average Low | Gust | |
| Average Temperature | Daily Average | ||