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Geryville (El-Bayadh) Weather Records (AGE00147720)

Record envelope, standing records and threshold days for Geryville (El-Bayadh) (AGE00147720), Algeria, with 51 years of record.

Key Facts for Geryville (El-Bayadh)

  • Geryville (El-Bayadh) (AGE00147720) is a weather station in Algeria at 33.68 latitude and 1.00 longitude, 1,320 m (4,331 ft) above sea level.
  • The station reports from 1888 to 1938, 51 years of record.
  • 1,464 records set at Geryville (El-Bayadh) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Geryville (El-Bayadh) tied a daily record low maximum temperature of 1.0 C (33.8 F) on 23 December 1938.

About the Station

  • Location: Algeria, 33.68 latitude, 1.00 longitude.
  • Elevation: 1,320 m (4,331 ft).
  • Period of record: 1888 to 1938, 51 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Geryville (El-Bayadh), with 2026 drawn through them The band shows the record high and record low for each calendar day at Geryville (El-Bayadh). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Geryville (El-Bayadh). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Geryville (El-Bayadh), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.0 C (77.0 F)-15.0 C (5.0 F)n/an/a
Feb25.0 C (77.0 F)-12.0 C (10.4 F)n/an/a
Mar30.0 C (86.0 F)-9.0 C (15.8 F)n/an/a
Apr31.0 C (87.8 F)-6.0 C (21.2 F)n/an/a
May36.0 C (96.8 F)-4.0 C (24.8 F)n/an/a
Jun40.0 C (104.0 F)-1.0 C (30.2 F)n/an/a
Jul48.0 C (118.4 F)4.0 C (39.2 F)n/an/a
Aug44.0 C (111.2 F)3.0 C (37.4 F)n/an/a
Sep39.0 C (102.2 F)1.0 C (33.8 F)n/an/a
Oct36.0 C (96.8 F)-3.0 C (26.6 F)n/an/a
Nov31.0 C (87.8 F)-10.0 C (14.0 F)n/an/a
Dec25.0 C (77.0 F)-11.0 C (12.2 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Geryville (El-Bayadh) by the year they were set 1,464 records at Geryville (El-Bayadh) still stand. 1903 holds the most, with 71. 0204060801888: 451889: 421890: 471892: 281893: 551895: 601897: 441898: 251899: 371900: 581901: 231902: 321903: 711904: 281905: 291906: 281907: 411908: 401909: 211910: 301911: 381912: 421913: 201914: 331915: 331916: 351917: 271919: 211923: 191924: 171925: 531926: 361927: 181928: 211929: 311930: 291931: 291932: 201933: 351934: 281935: 371936: 291937: 91938: 20188818951901190619111916192519301935
1,464 records at Geryville (El-Bayadh) still stand. 1903 holds the most, with 71.
Standing records at Geryville (El-Bayadh) by the year they were set
Year setStanding records
188845
188942
189047
189228
189355
189560
189744
189825
189937
190058
190123
190232
190371
190428
190529
190628
190741
190840
190921
191030
191138
191242
191320
191433
191533
191635
191727
191921
192319
192417
192553
192636
192718
192821
192931
193029
193129
193220
193335
193428
193537
193629
19379
193820

All-Time Record Progression

1 new records
When Geryville (El-Bayadh) set new all-time records 1 all-time records were set at Geryville (El-Bayadh) between 29 January 1935 and 29 January 1935. Each dot is a new record. Record low minimum temperature29 January 1935: Record low minimum temperature -15.0 C (5.0 F)1935
1 all-time records were set at Geryville (El-Bayadh) between 29 January 1935 and 29 January 1935. Each dot is a new record.
When Geryville (El-Bayadh) set new all-time records
DateKindDetail
1935-01-29Record low minimum temperatureRecord low minimum temperature -15.0 C (5.0 F)

Wettest Day of Each Month

Dec: 95.0 mm (3.7 in)
Record daily precipitation for each month at Geryville (El-Bayadh) The wettest day on record for each calendar month at Geryville (El-Bayadh). The most was 95.0 mm (3.7 in) on 22 December 1897. 0255075100 Jan: 90.0 mm (3.5 in), 19 January 1898 Jan Feb: 70.0 mm (2.8 in), 24 February 1898 Feb Mar: 70.0 mm (2.8 in), 20 March 1898 Mar Apr: 90.0 mm (3.5 in), 6 April 1898 Apr May: 91.0 mm (3.6 in), 7 May 1909 May Jun: 33.0 mm (1.3 in), 18 June 1909 Jun Jul: 40.0 mm (1.6 in), 10 July 1897 Jul Aug: 20.0 mm (0.8 in), 7 August 1909 Aug Sep: 55.0 mm (2.2 in), 24 September 1890 Sep Oct: 41.7 mm (1.6 in), 5 October 1890 Oct Nov: 42.0 mm (1.7 in), 14 November 1902 Nov Dec: 95.0 mm (3.7 in), 22 December 1897 Dec
The wettest day on record for each calendar month at Geryville (El-Bayadh). The most was 95.0 mm (3.7 in) on 22 December 1897.
Record daily precipitation for each month at Geryville (El-Bayadh)
MonthRecord daily precipitation (mm)Date
Jan90.0 mm (3.5 in)19 January 1898
Feb70.0 mm (2.8 in)24 February 1898
Mar70.0 mm (2.8 in)20 March 1898
Apr90.0 mm (3.5 in)6 April 1898
May91.0 mm (3.6 in)7 May 1909
Jun33.0 mm (1.3 in)18 June 1909
Jul40.0 mm (1.6 in)10 July 1897
Aug20.0 mm (0.8 in)7 August 1909
Sep55.0 mm (2.2 in)24 September 1890
Oct41.7 mm (1.6 in)5 October 1890
Nov42.0 mm (1.7 in)14 November 1902
Dec95.0 mm (3.7 in)22 December 1897

Period of Record Coverage

1888 to 1938
Days with data per year at Geryville (El-Bayadh) 48 years of record at Geryville (El-Bayadh), 1888 to 1938. 20 years have data for under 90 percent of days and are left out of rankings: 1888, 1889, 1890, 1891, 1892, 1894, 1896, 1917 and others. 1888: 324 of 366 days1889: 316 of 365 days1890: 316 of 365 days1891: 1 of 365 days1892: 319 of 366 days1893: 348 of 365 days1894: 1 of 365 days1895: 354 of 365 days1896: 1 of 366 days1897: 351 of 365 days1898: 342 of 365 days1899: 364 of 365 days1900: 346 of 365 days1901: 350 of 365 days1902: 349 of 365 days1903: 358 of 365 days1904: 363 of 366 days1905: 349 of 365 days1906: 356 of 365 days1907: 358 of 365 days1908: 366 of 366 days1909: 360 of 365 days1910: 350 of 365 days1911: 354 of 365 days1912: 362 of 366 days1913: 340 of 365 days1914: 347 of 365 days1915: 333 of 365 days1916: 350 of 366 days1917: 294 of 365 days1918: 1 of 365 days1919: 224 of 365 days1923: 169 of 365 days1924: 346 of 366 days1925: 343 of 365 days1926: 329 of 365 days1927: 313 of 365 days1928: 323 of 366 days1929: 342 of 365 days1930: 318 of 365 days1931: 321 of 365 days1932: 339 of 366 days1933: 345 of 365 days1934: 323 of 365 days1935: 320 of 365 days1936: 245 of 366 days1937: 120 of 365 days1938: 292 of 365 days1890190019101930
48 years of record at Geryville (El-Bayadh), 1888 to 1938. 20 years have data for under 90 percent of days and are left out of rankings: 1888, 1889, 1890, 1891, 1892, 1894, 1896, 1917 and others.
Days with data per year at Geryville (El-Bayadh)
YearDays with dataShare of yearComplete
188832489%No
188931687%No
189031687%No
189110%No
189231987%No
189334895%Yes
189410%No
189535497%Yes
189610%No
189735196%Yes
189834294%Yes
1899364100%Yes
190034695%Yes
190135096%Yes
190234996%Yes
190335898%Yes
190436399%Yes
190534996%Yes
190635698%Yes
190735898%Yes
1908366100%Yes
190936099%Yes
191035096%Yes
191135497%Yes
191236299%Yes
191334093%Yes
191434795%Yes
191533391%Yes
191635096%Yes
191729481%No
191810%No
191922461%No
192316946%No
192434695%Yes
192534394%Yes
192632990%Yes
192731386%No
192832388%No
192934294%Yes
193031887%No
193132188%No
193233993%Yes
193334595%Yes
193432388%No
193532088%No
193624567%No
193712033%No
193829280%No

Latest Records

20
Latest records at Geryville (El-Bayadh)
DateStationRecordValueBeat old record byOld record stoodSignificance
23 December 1938Geryville (El-Bayadh), DZdaily low max (Tie)1.0 C (33.8 F)tie4 years1 of 100 (Routine)
26 November 1938Geryville (El-Bayadh), DZdaily high min (Tie)7.0 C (44.6 F)tie15 years2 of 100 (Routine)
25 November 1938Geryville (El-Bayadh), DZdaily rain15.0 mm (0.6 in)11.7 mm (0.5 in)11 years20 of 100 (Routine)
18 November 1938Geryville (El-Bayadh), DZdaily low max8.0 C (46.4 F)1.0 C (1.8 F)38 years18 of 100 (Routine)
26 October 1938Geryville (El-Bayadh), DZdaily low max (Tie)12.0 C (53.6 F)tie24 years3 of 100 (Routine)
16 September 1938Geryville (El-Bayadh), DZdaily rain10.0 mm (0.4 in)2.0 mm (0.08 in)5 years8 of 100 (Routine)
14 September 1938Geryville (El-Bayadh), DZdaily high min (Tie)20.0 C (68.0 F)tie4 years1 of 100 (Routine)
9 September 1938Geryville (El-Bayadh), DZdaily low max21.0 C (69.8 F)1.0 C (1.8 F)24 years14 of 100 (Routine)
3 September 1938Geryville (El-Bayadh), DZdaily high min (Tie)22.0 C (71.6 F)tie15 years2 of 100 (Routine)
30 August 1938Geryville (El-Bayadh), DZdaily low max25.0 C (77.0 F)3.0 C (5.4 F)4 years16 of 100 (Routine)
29 August 1938Geryville (El-Bayadh), DZdaily low max (Tie)27.0 C (80.6 F)tie24 years3 of 100 (Routine)
26 August 1938Geryville (El-Bayadh), DZdaily rain9.0 mm (0.35 in)8.0 mm (0.31 in)0 years20 of 100 (Routine)
3 August 1938Geryville (El-Bayadh), DZdaily low max (Tie)31.0 C (87.8 F)tie12 years2 of 100 (Routine)
1 August 1938Geryville (El-Bayadh), DZdaily low min (Tie)12.0 C (53.6 F)tie29 years3 of 100 (Routine)
11 July 1938Geryville (El-Bayadh), DZdaily rain2.5 mm (0.10 in)0.5 mm (0.02 in)32 years14 of 100 (Routine)
9 July 1938Geryville (El-Bayadh), DZdaily high min25.0 C (77.0 F)4.0 C (7.2 F)29 years23 of 100 (Routine)
10 May 1938Geryville (El-Bayadh), DZdaily low max12.0 C (53.6 F)3.0 C (5.4 F)45 years24 of 100 (Routine)
9 May 1938Geryville (El-Bayadh), DZdaily low max10.0 C (50.0 F)2.0 C (3.6 F)1 year9 of 100 (Routine)
8 May 1938Geryville (El-Bayadh), DZmonthly low max (Tie)9.0 C (48.2 F)tie48 years7 of 100 (Routine)
6 May 1938Geryville (El-Bayadh), DZdaily low max (Tie)13.0 C (55.4 F)tie42 years4 of 100 (Routine)

Climate Trend

30 complete years, 1890 to 1938
Annual mean temperature at Geryville (El-Bayadh) as warming stripes, 1890 to 1938 One stripe for each of 30 complete years at Geryville (El-Bayadh), 1890 to 1938. Blue stripes are years cooler than the station's own mean of 14.0 C (57.2 F); red stripes are warmer. The coolest year was 1925, at 12.8 C (55.0 F), and the warmest was 1903, at 16.1 C (60.9 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1890: 12.8 C, -1.2 C from the station mean1893: 14.6 C, +0.6 C from the station mean1895: 14.7 C, +0.7 C from the station mean1897: 14.9 C, +0.8 C from the station mean1898: 14.3 C, +0.3 C from the station mean1899: 14.9 C, +0.9 C from the station mean1900: 13.1 C, -0.9 C from the station mean1901: 13.6 C, -0.4 C from the station mean1902: 14.5 C, +0.4 C from the station mean1903: 16.1 C, +2.0 C from the station mean1904: 14.4 C, +0.4 C from the station mean1906: 14.0 C, 0.0 C from the station mean1907: 14.0 C, 0.0 C from the station mean1908: 14.4 C, +0.4 C from the station mean1909: 13.9 C, -0.1 C from the station mean1910: 14.0 C, 0.0 C from the station mean1911: 13.5 C, -0.5 C from the station mean1912: 14.1 C, +0.1 C from the station mean1913: 14.7 C, +0.7 C from the station mean1914: 13.8 C, -0.2 C from the station mean1916: 14.0 C, -0.1 C from the station mean1924: 14.0 C, 0.0 C from the station mean1925: 12.8 C, -1.3 C from the station mean1929: 13.6 C, -0.4 C from the station mean1931: 14.2 C, +0.2 C from the station mean1932: 13.9 C, -0.2 C from the station mean1933: 13.9 C, -0.1 C from the station mean1934: 13.4 C, -0.7 C from the station mean1935: 13.7 C, -0.3 C from the station mean1938: 13.1 C, -0.9 C from the station mean1890189519001905191019151920192519301935
One stripe for each of 30 complete years at Geryville (El-Bayadh), 1890 to 1938. Blue stripes are years cooler than the station's own mean of 14.0 C (57.2 F); red stripes are warmer. The coolest year was 1925, at 12.8 C (55.0 F), and the warmest was 1903, at 16.1 C (60.9 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Geryville (El-Bayadh) as warming stripes, 1890 to 1938
YearAnnual mean temperatureDifference from the station mean
189012.8 C-1.23 C
189314.6 C+0.61 C
189514.7 C+0.68 C
189714.9 C+0.83 C
189814.3 C+0.29 C
189914.9 C+0.91 C
190013.1 C-0.95 C
190113.6 C-0.40 C
190214.5 C+0.43 C
190316.1 C+2.03 C
190414.4 C+0.40 C
190614.0 C-0.05 C
190714.0 C-0.05 C
190814.4 C+0.40 C
190913.9 C-0.11 C
191014.0 C-0.03 C
191113.5 C-0.54 C
191214.1 C+0.08 C
191314.7 C+0.65 C
191413.8 C-0.19 C
191614.0 C-0.06 C
192414.0 C-0.02 C
192512.8 C-1.27 C
192913.6 C-0.45 C
193114.2 C+0.15 C
193213.9 C-0.16 C
193313.9 C-0.13 C
193413.4 C-0.67 C
193513.7 C-0.28 C
193813.1 C-0.88 C

The annual mean temperature here has fallen by 0.18 C (0.01 to 0.36) per decade over 1890 to 1938. In Fahrenheit: 0.33 F (0.02 to 0.64) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Geryville (El-Bayadh)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.18 C (-0.35 to -0.01) per decade-0.33 F (-0.64 to -0.02) per decade1890 to 193830Fall
Mean daily maximum-0.5 C (-0.8 to -0.3) per decade-1.0 F (-1.4 to -0.5) per decade1890 to 193830Fall
Mean daily minimum0.18 C (0.03 to 0.33) per decade0.3 F (0.1 to 0.6) per decade1890 to 193830Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1888 to 1938
Yearly extremes at Geryville (El-Bayadh): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)48.0 C (118.4 F)191539.0 C (102.2 F)48
Coldest night (TNn)-15.0 C (5.0 F)1935-9.0 C (15.8 F)45
Wettest day (Rx1day)95.0 mm (3.7 in)189725.0 mm (1.0 in)48
Wettest five days (Rx5day)250.0 mm (9.8 in)189839.1 mm (1.5 in)44
Longest dry spell (CDD)97 days189530 days47

Hottest day (TXx)

Hottest day (TXx) at Geryville (El-Bayadh) by year The hottest day of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 48.0 C (118.4 F) in 1915, marked on the chart; the median year is 39.0 C (102.2 F). 0102030405018901900191019201930Record: 48.0 C (118.4 F) in 1915
The hottest day of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 48.0 C (118.4 F) in 1915, marked on the chart; the median year is 39.0 C (102.2 F).
Hottest day (TXx) at Geryville (El-Bayadh) by year
YearHottest day (TXx)
188840.0 C (104.0 F)
188940.0 C (104.0 F)
189042.0 C (107.6 F)
189115.0 C (59.0 F)
189238.0 C (100.4 F)
189341.0 C (105.8 F)
18948.0 C (46.4 F)
189541.0 C (105.8 F)
189613.0 C (55.4 F)
189741.0 C (105.8 F)
189841.0 C (105.8 F)
189940.0 C (104.0 F)
190039.0 C (102.2 F)
190139.0 C (102.2 F)
190241.0 C (105.8 F)
190342.0 C (107.6 F)
190440.0 C (104.0 F)
190539.0 C (102.2 F)
190641.0 C (105.8 F)
190742.0 C (107.6 F)
190841.0 C (105.8 F)
190944.0 C (111.2 F)
191042.0 C (107.6 F)
191141.0 C (105.8 F)
191243.0 C (109.4 F)
191342.0 C (107.6 F)
191439.0 C (102.2 F)
191548.0 C (118.4 F)
191639.0 C (102.2 F)
191738.0 C (100.4 F)
191810.0 C (50.0 F)
191939.0 C (102.2 F)
192337.0 C (98.6 F)
192437.0 C (98.6 F)
192539.0 C (102.2 F)
192639.0 C (102.2 F)
192738.0 C (100.4 F)
192837.0 C (98.6 F)
192937.0 C (98.6 F)
193038.0 C (100.4 F)
193139.0 C (102.2 F)
193237.0 C (98.6 F)
193336.0 C (96.8 F)
193442.0 C (107.6 F)
193538.0 C (100.4 F)
193638.0 C (100.4 F)
193739.0 C (102.2 F)
193838.0 C (100.4 F)

Coldest night (TNn)

Coldest night (TNn) at Geryville (El-Bayadh) by year The coldest night of the year at Geryville (El-Bayadh), 1888 to 1938. The record is -15.0 C (5.0 F) in 1935, marked on the chart; the median year is -9.0 C (15.8 F). -15-10-5018901900191019201930Record: -15.0 C (5.0 F) in 1935
The coldest night of the year at Geryville (El-Bayadh), 1888 to 1938. The record is -15.0 C (5.0 F) in 1935, marked on the chart; the median year is -9.0 C (15.8 F).
Coldest night (TNn) at Geryville (El-Bayadh) by year
YearColdest night (TNn)
1888-10.0 C (14.0 F)
1889-9.0 C (15.8 F)
1890-8.0 C (17.6 F)
1891n/a
1892-6.0 C (21.2 F)
1893-10.0 C (14.0 F)
1894n/a
1895-9.0 C (15.8 F)
1896n/a
1897-10.0 C (14.0 F)
1898-10.0 C (14.0 F)
1899-9.0 C (15.8 F)
1900-9.0 C (15.8 F)
1901-9.0 C (15.8 F)
1902-9.0 C (15.8 F)
1903-9.0 C (15.8 F)
1904-9.0 C (15.8 F)
1905-10.0 C (14.0 F)
1906-9.0 C (15.8 F)
1907-10.0 C (14.0 F)
1908-7.0 C (19.4 F)
1909-12.0 C (10.4 F)
1910-9.0 C (15.8 F)
1911-10.0 C (14.0 F)
1912-8.0 C (17.6 F)
1913-8.0 C (17.6 F)
1914-7.0 C (19.4 F)
1915-11.0 C (12.2 F)
1916-7.0 C (19.4 F)
1917-8.0 C (17.6 F)
1918-2.0 C (28.4 F)
1919-6.0 C (21.2 F)
1923-9.0 C (15.8 F)
1924-10.0 C (14.0 F)
1925-10.0 C (14.0 F)
1926-7.0 C (19.4 F)
1927-6.0 C (21.2 F)
1928-6.0 C (21.2 F)
1929-9.0 C (15.8 F)
1930-5.0 C (23.0 F)
1931-8.0 C (17.6 F)
1932-11.0 C (12.2 F)
1933-9.0 C (15.8 F)
1934-8.0 C (17.6 F)
1935-15.0 C (5.0 F)
1936-6.0 C (21.2 F)
1937-6.0 C (21.2 F)
1938-12.0 C (10.4 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Geryville (El-Bayadh) by year The wettest day of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 95.0 mm (3.7 in) in 1897, marked on the chart; the median year is 25.0 mm (1.0 in). 025507510018901900191019201930Record: 95.0 mm (3.7 in) in 1897
The wettest day of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 95.0 mm (3.7 in) in 1897, marked on the chart; the median year is 25.0 mm (1.0 in).
Wettest day (Rx1day) at Geryville (El-Bayadh) by year
YearWettest day (Rx1day)
188849.0 mm (1.9 in)
188969.0 mm (2.7 in)
189055.0 mm (2.2 in)
18910.0 mm (0.00 in)
189217.0 mm (0.7 in)
189336.0 mm (1.4 in)
18940.0 mm (0.00 in)
189520.0 mm (0.8 in)
18960.0 mm (0.00 in)
189795.0 mm (3.7 in)
189890.0 mm (3.5 in)
189925.0 mm (1.0 in)
190026.0 mm (1.0 in)
190132.5 mm (1.3 in)
190242.0 mm (1.7 in)
19038.3 mm (0.33 in)
190417.0 mm (0.7 in)
190523.0 mm (0.9 in)
190616.0 mm (0.6 in)
190726.0 mm (1.0 in)
190860.0 mm (2.4 in)
190991.0 mm (3.6 in)
191038.5 mm (1.5 in)
191127.9 mm (1.1 in)
191217.2 mm (0.7 in)
191312.0 mm (0.5 in)
191426.2 mm (1.0 in)
191539.0 mm (1.5 in)
191625.0 mm (1.0 in)
191726.3 mm (1.0 in)
19187.3 mm (0.29 in)
191924.5 mm (1.0 in)
192321.0 mm (0.8 in)
192413.0 mm (0.5 in)
192522.5 mm (0.9 in)
192625.0 mm (1.0 in)
192724.0 mm (0.9 in)
192825.0 mm (1.0 in)
192926.0 mm (1.0 in)
193021.0 mm (0.8 in)
193122.0 mm (0.9 in)
193229.0 mm (1.1 in)
193341.0 mm (1.6 in)
193421.0 mm (0.8 in)
193531.0 mm (1.2 in)
193630.5 mm (1.2 in)
193722.0 mm (0.9 in)
193821.0 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Geryville (El-Bayadh) by year The wettest five days of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 250.0 mm (9.8 in) in 1898, marked on the chart; the median year is 39.1 mm (1.5 in). 010020030018901900191019201930Record: 250.0 mm (9.8 in) in 1898
The wettest five days of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 250.0 mm (9.8 in) in 1898, marked on the chart; the median year is 39.1 mm (1.5 in).
Wettest five days (Rx5day) at Geryville (El-Bayadh) by year
YearWettest five days (Rx5day)
188859.0 mm (2.3 in)
1889114.0 mm (4.5 in)
1890132.6 mm (5.2 in)
1891n/a
189236.5 mm (1.4 in)
189344.5 mm (1.8 in)
1894n/a
189530.0 mm (1.2 in)
1896n/a
1897211.0 mm (8.3 in)
1898250.0 mm (9.8 in)
189936.5 mm (1.4 in)
190061.6 mm (2.4 in)
190136.9 mm (1.5 in)
190293.0 mm (3.7 in)
190324.4 mm (1.0 in)
190431.3 mm (1.2 in)
190531.0 mm (1.2 in)
190634.0 mm (1.3 in)
190726.2 mm (1.0 in)
1908106.3 mm (4.2 in)
1909162.0 mm (6.4 in)
191058.8 mm (2.3 in)
191156.1 mm (2.2 in)
191249.1 mm (1.9 in)
191315.5 mm (0.6 in)
191436.4 mm (1.4 in)
191552.0 mm (2.0 in)
191625.0 mm (1.0 in)
191740.4 mm (1.6 in)
1918n/a
191933.6 mm (1.3 in)
192327.1 mm (1.1 in)
192429.0 mm (1.1 in)
192555.5 mm (2.2 in)
192628.2 mm (1.1 in)
192728.0 mm (1.1 in)
192840.9 mm (1.6 in)
192953.0 mm (2.1 in)
193028.0 mm (1.1 in)
193153.0 mm (2.1 in)
193238.1 mm (1.5 in)
193377.8 mm (3.1 in)
193440.0 mm (1.6 in)
193540.1 mm (1.6 in)
193630.5 mm (1.2 in)
193725.4 mm (1.0 in)
193835.0 mm (1.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Geryville (El-Bayadh) by year The longest dry spell of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 97 days in 1895, marked on the chart; the median year is 30 days. 025507510018901900191019201930Record: 97 days in 1895
The longest dry spell of the year at Geryville (El-Bayadh), 1888 to 1938. The record is 97 days in 1895, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Geryville (El-Bayadh) by year
YearLongest dry spell (CDD)
188838 days
188929 days
189023 days
18911 day
189230 days
189328 days
18941 day
189597 days
18961 day
189747 days
189860 days
189924 days
190019 days
190129 days
190245 days
190356 days
190442 days
190530 days
190618 days
190738 days
190831 days
190928 days
191041 days
191128 days
191264 days
191331 days
191433 days
191537 days
191644 days
191726 days
1918n/a
191924 days
192334 days
192463 days
192521 days
192623 days
192731 days
192824 days
192921 days
193032 days
193128 days
193232 days
193335 days
193428 days
193534 days
193639 days
193722 days
193812 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

30 years with a frost

Across 30 years with a frost, the median last spring frost at Geryville (El-Bayadh) falls on 26 April and the median first autumn frost on 2 November, which leaves a median of 193 days between them.

Fitted over all years, the growing season changes by -2.2 days per decade at this station.

Frost dates and growing season at Geryville (El-Bayadh)
MeasureMedian, all yearsEarliest periodRecent period (1890 to 1938)Recent against earliestFitted trend
Last spring frost26 Apriln/a26 Apriln/a+0.2 days per decade
First autumn frost2 Novembern/a2 Novembern/a-2.0 days per decade
Growing days193 daysn/a193 daysn/a-2.2 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

30 years, 1893 to 1935

A day with at least 26.6 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 133.3 mm (5.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Geryville (El-Bayadh): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years26.6 mm (1.0 in)
5 years42.9 mm (1.7 in)
10 years57.4 mm (2.3 in)
25 years81.5 mm (3.2 in)
50 years104.6 mm (4.1 in)Longer than the 30 years of record
100 years133.3 mm (5.2 in)Longer than the 30 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 30 years of values from 1893 to 1935.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 95.0 mm (3.7 in) in 1897; 91.0 mm (3.6 in) in 1909; 90.0 mm (3.5 in) in 1898.

Download the Data

  • Data for Geryville (El-Bayadh) standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Geryville (El-Bayadh) threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).