1. What is the average daily temperature?
The average daily temperature is calculated as the arithmetic average over 8 or 24 periods of meteorological day.
2. You have some nonsense in the values of the minimum and maximum temperatures on your website in the Climate Monitor. I compare with other sites and see significant discrepancies: the lows are often too low and the highs are too high. What's the matter?
Unfortunately, the meteorological stations in some countries transmit only the daytime maximum and the nighttime minimum, you can see these values on other sites. However, often (most often in winter) there is a monotonous increase (decrease) in temperature during the day, therefore, the highest air temperature is often not during the day, but at the time of the beginning of the meteorological day, roughly speaking, the night before. Also, as a result of the invasion of cold air during the day or strong cooling of the air on a long winter evening, the air temperature at the end of the meteorological day may be lower than in the morning hours. Therefore, we decided to consider the daily minimum the lowest temperature value selected from 8 values ??and the night minimum, and the daily maximum - the highest temperature value selected from 8 values, the value recorded at the beginning of the meteorological day and the daytime maximum.
3. What is a meteorological day and when does it start?
It depends on what time zone the weather station is in. WMO (World Meteorological Organization) has set the start time of the meteorological day for different time zones:
0 hours: 19-24 time zones;
6 hours: 13-18 time zones;
12 hours: 7-12 time zones;
18 hours: 1-6 time zones.
(Universal time, UT). So if the meteorological day begins at 18 UT, the average and extreme values of air temperature and other meteorological parameters are calculated, the amount of precipitation is determined, etc at this time.
4. What is the difference between Germany and Universal Time?
+1 hour in summer and +2 hours in winter.
5. I found at Weather Records (Climate Monitor) section too cold (hot) yesterday. What's going on?
Air temperature and precipitation monitoring services are fully automated. Observers at weather stations encode weather information with a special code SYNOP, from where it, having traveled a long way, goes to the world data center in Washington, and from there to our website, where it is decoded and processed. Sometimes during the coding process, errors occur that go through this entire chain unchanged. Currently, the site has an automated control of air temperature values, so most of the errors are corrected within 12 hours. Unfortunately, some errors cannot be corrected by the algorithm. Such errors have to be corrected manually. Therefore, we would be grateful if you would inform us about any inaccuracies you noticed.
6. Are you planning to expand the list of stations in the Climate Monitor?
This is not planned because in monitoring, the focus is not on quantity, but on quality. Errors are inevitable in climate norms and current data. And the number of stations for which we can carry out a manual check is limited for obvious reasons.
7. For what period have you calculated climatic data for cities in the World Climate section?
Average values of air temperature and precipitation, average values of wind, upper and lower cloudiness, air humidity, snow cover, the number of days with different types of precipitation, clear, cloudy and cloudy days are calculated based on data for 1991-2020. The number of days with different phenomena and the frequency of occurrence of different types of clouds are also calculated based on data for 1981-2010. When determining the extreme values of meteorological elements, data were taken for the entire observation period: archives from the sites like ncdc.noaa.gov, and other sources were used.
8. What sources do you get the weather forecast from?
Our website contains an extended 3-, 7-, 14-days combined weather forecast based on data from several global atmospheric models. Updating the forecast is fully automated and takes place without the participation of forecasters and the control of the site administrator. In addition, the comfort of the weather is calculated using a unique method.
9. Believing the weather forecast on your website, I didn't take an umbrella (hat) with me and got wet (frostbitten ears), etc. I found some errors in your data tables. Why are you giving false information?
We are not responsible for the accuracy of forecasts and the reliability of other meteorological data, because all information presented on the site is unofficial.
10. What if I didn't find an answer to my question here?
Please contact us and we will try to answer your question.