South Africa is a sunny country, averaging 8–10 daily sunshine hours in most regions. Clear. The above results correlate with the general finding that rainfall in many parts of the southern and central interior experienced increases in annual and particularly summer rainfall, while in the extreme east decreases are evident in both annual rainfall and the frequency of high daily rainfall totals. temperatures, humidity and precipation. The statistical significance of the linear trends of the indices was evaluated by the 2-sided t-test at the 5% level, and assuming Gaussian non-correlation. Keywords: rainfall trends, extreme rainfall, climate change, South Africa. Two interlinked datasets, namely the district rainfall and individual rainfall stations datasets were used for the trend analyses, namely, daily time series of 60 individual rainfall stations and the daily district rainfall of 88 of 94 rainfall districts in South Africa. Here we did not only add additional recent data (5 years), but used an analysis period which is much longer than the most recent historical trend study by McKellar et al. 110 (7/8). There is little rainfall throughout the year. The locations of the rainfall stations are presented in, is a software package developed under the auspices of the WMO ETCCDI that provides for the calculation of 27 core indices of temperature and rainfall extremes for the detection of changes in the climate (Zhang and Yang, 2004). PREV. These findings confirm those of the global study by Donat et al. The aim of this study is to update the analysis of historical rainfall … In general, the results show an increase in rainfall for most rainfall stations in the southern interior of South Africa, and indications of decreases in rainfall in the far northern and north-eastern parts. Decreases in SDII were displayed by some districts in the far eastern interior, indicating that in that region some places experienced fewer days per year with relatively high rainfall. Climate Data Online (CDO) provides free access to NCDC's archive of global historical weather and climate data in addition to station history information. (2014) agree on the identified increases in the west, this study and that of Kruger (2006) do not extend the increases to the south-western Cape. As with much of inland South Africa, Polokwane has experienced notably warmer seasons over the last decade than its long-term average. Part 10. Maximum temperature … Is it COVID-19 or the flu? Weather SA maintains historical rainfall maps as well as daily and ten-day rainfall data . Climate Information for Pretoria, South Africa. Average Monthly Rainfall 1901 - 2009 (mm) The Climate Change Knowledge Portal is a hub of information, data and reports about climate change around the world. Not only is … The wettest month for Pretoria is December … DEA, Pretoria. 20mm, were also determined to obtain an impression of seasonal tendencies in total rainfall and high rainfall events. Historical rainfall trends in South Africa: 1921-2015, IClimate Service, South African Weather Service, Private Bag X097, Pretoria, 0001, South Africa IIDepartment of Geography, Geoinformatics and Meteorology, Faculty of Natural and Agricultural Sciences, University of Pretoria, South Africa. The index results are provided at annual and monthly time scales. You are currently offline. You only need to pay a one time fee to get data in CSV format. tics (STAT) fund. Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 67 °F. Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. It is clear that the positive trends in annual rainfall totals in the southern and western interior are reflected mostly in the summer rainfall trends, which is the main rainfall season for these particular regions, with significant upward trends of more than 5 mm per decade. Some of the stations have data since 1957. of Stations SAWS 8 281 ARC 2 661 SASA 161 PVT 1 050 Total 12 153 ... have to be accumulated in a correct historical sequence. South Africa: Climate Information by City °C | °F. In addition to trends in seasonal and annual rainfall totals, of importance in terms of the impact of rainfall are trends in extreme precipitation events. Alldays. The weather today in Johannesburg: Show in Celsius. See Hour-by-hour Forecast for upcoming weather. (2014), i.e., 1921-2015 vs. 1961-2010, more than doubling the analysis period. post-doctoral fellowship programme, the National Research foundation grant In contrast to surface temperatures, which show almost consistent upward trends, trends in precipitation were variable across the globe (Donat et al., 2013). Cape Town Temperature Yesterday. January, the same as December, is a moderately hot summer month in Pretoria, South Africa, with average temperature fluctuating between 29°C (84.2°F) and 18°C (64.4°F).January is the warmest month, with an average high-temperature of 29°C (84.2°F) and an average low-temperature of 18°C (64.4°F). Precipitation in South Africa averaged 39.17 mm from 1901 until 2015, reaching an all time high of 145.76 mm in March of 1925 and a record low of 2.50 mm in May of 1986. For the south-western Cape the longest annual wet spell usually occurs during winter, while in the remainder of the country it usually falls in summer. Climate-Data.org > South Africa > North West > Brits. Weather History. South Africa’s mean annual rainfall ranges from less than 100 mm in the north-west to almost 1,200mm over the east and on the southern margins (Second National Communication, 2011). Therefore, this mean is essentially a measure of the dry season duration (i.e. Conversion Table; Earthquake; Tsunami Warning Center; Flood Warnings; Lightning; Fire; Volcano; Tides; Sun & Moon; Space Weather; Aurora Forecast; Clear Sky Chart; Weather Cams; Contact; Weather History. Historical rainfall trends in South Africa: 1921–2015 AC Kruger1,2* and MP Nxumalo1 1Climate Service, South African Weather Service, Private Bag X097, Pretoria, 0001, South Africa 2Department of Geography, Geoinformatics and Meteorology, Faculty of Natural and Agricultural Sciences, University of Pretoria, South Africa INTRODUCTION Precipitation. The results of the rx1day index, presented in Fig. In contrast to surface temperatures, which show almost consistent upward trends, trends in precipitation were variable across the globe (, Various recent studies have acknowledged tendencies of increased extreme precipitation over some parts of South Africa, such as increased annual frequency of very heavy rainfall events in the eastern parts of South Africa from 1906 to 1997 (, Precipitation variables of interest usually include the mean annual precipitation, the onset and end of rainfall seasons, wet and dry spell duration periods and the occurrence of extreme heavy rainfall events (McKellar et al. 12, indicate that the maximum annual amount of continuous rainfall in a 5-day episode has increased in parts of the southern interior. Africa; Links. Therefore it is essential to update the analysis of historical rainfall trends on a regular basis. Brits Climate (South Africa) >>Brits Weather by month // weather averages >>Brits Climate graph // Weather by Month >>Brits average temperature >>Brits Weather; Brits climate summary The Brits lies on 1127m above sea level Brits's climate is a local steppe climate. South African Weather Service. Res. The r95p and r99p indices are calculated to determine trends in daily rainfall extremes, although other indices such as r10mm, r20mm, r25mm and rx1day also provide indications of trends in high and extreme daily rainfall events. For the latter, the analysis was based on extreme precipitation indices developed by the World Meteorological Organization (WMO) Expert Team on Climate Change Detection and Indices (ETCCDI), which is used globally to detect trends in relevant climate extremes (, In addition to the data discussed above, the delineation of districts of homogeneous rainfall, as used by the South African Weather Service (SAWS), aided in the attempt to cover as much of the areas with unique rainfall characteristics as possible. For instance, from the district rainfall results, District 33 has a significant negative trend, while the single long-term station has a non-significant positive trend. For Pretoria in January the daily average maximum temperatures is 29°C with the average minimum 15°C, while in June the average maximum is 20°C with a minimum of 1°C. The terrain: vast interior plateau rimmed by rugged hills and narrow coastal plain. S. Afr. (2013) showed an increase in the R95p index, particularly since the early 1930s. DOI: 10.4314/WSA.V43I2.12 Corpus ID: 55115108. This study improves on previous studies in the region by more than doubling the analysis period, largely eliminating the influence that decadal-scale cycles might have on analyses over shorter periods. Hourly historical weather simulation data since 1985. For the south-western half of the country the trends are mostly non-significant, except for 3 stations in the Eastern Cape interior, which show significantly positive trends of between 0.1 and 0.2 days per decade. NEW M, HEWITSON B, STEPHENSON DB, TSIGA A, KRUGER A, MANHIQUE A, GOMEZ B, COELHO CAS, MASISI DN, KULULANGA E, MBAMBAKLALA E, ADESINA F, SALEH H, KANYANGA J, ADOSI J, BULANE L, FORTUNATA L, MDOKA ML and LAJOIE R (2009) Evidence of trends in daily climate extremes over southern and west Africa. Is it COVID-19 or the flu? rainfall data in South Africa is viewed as unreliable, as many errors in the digitisation process were evident in the data. Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 68 °F. South African Weather Service. For the trend analysis of annual rainfall, both results of individual station data and district rainfall are presented, to provide an impression of the probable extent of significant trends, particularly in those areas where continuous individual station data are not available for the whole analysis period. The trend results, presented in. DONAT MG, ALEXANDER LV, YANG H, DURRE I, VOSE R, DUNN RJH, WILLETT KM, AGUILAR E, BRUNET M, CAESAR J and co-authors (2013) Updated analyses of temperature and precipitation extreme indices since the beginning of the twentieth century: the HadEX2 dataset. Therefore, it is not advisable to use only district rainfall totals to, in this case, determine historical trends. (2014) which could indicate that decreases in the rainfall in this particular area have become more pronounced and significant during recent decades, especially in autumn, since the latter study focuses on more recent decades. (2014). From the extreme rainfall analyses, an increase in daily rainfall extremes in the southern to western interior is apparent. The Continuous Wet Days (CWD) index indicates the maximum number of continuous wet days per year. For most years the total will be 0, but r99p is still useful as an indication of more extreme daily rainfall conditions that may have occurred, especially outside the base period, and whether these occurrences happened earlier or later during the period analysed. RClimDex is a software package developed under the auspices of the WMO ETCCDI that provides for the calculation of 27 core indices of temperature and rainfall extremes for the detection of changes in the climate (Zhang and Yang, 2004). Figure 13, which presents the trends in CWD, predominantly shows a decrease in the largest part of the north-eastern half of the country, with some stations indicating statistically significant decreases in excess of 0.2 days per decade. In addition, comparisons between the 24 h rainfall totals, computed from the digitised rainfall data, and daily rainfa ll, as measured at 08:00 every day using standard non-recording raingauges at the same site, indi cated numerous significant discrepancies in the Climate … [ Links ], NEW M, HEWITSON B, STEPHENSON DB, TSIGA A, KRUGER A, MANHIQUE A, GOMEZ B, COELHO CAS, MASISI DN, KULULANGA E, MBAMBAKLALA E, ADESINA F, SALEH H, KANYANGA J, ADOSI J, BULANE L, FORTUNATA L, MDOKA ML and LAJOIE R (2009) Evidence of trends in daily climate extremes over southern and west Africa. Annual and monthly time scales year from days with rainfall above the 95th 99th! 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