# IEM Climodat https://mesonet.agron.iastate.edu/climodat/ # Report Generated: 08 Jun 2026 # Climate Record: 1878-08-01 -> 2026-06-08 # Site Information: [IA2203] Des Moines Airport # Contact: Daryl Herzmann akrherz@iastate.edu 515.294.5978 # Low Temperature exceedence probabilities # On a certain date, what is the observed frequency that a given temperature threshold has been first observed by the given date. DOY Date <=32 <=28 <=26 <=22 214 Aug 01 0 0 0 0 216 Aug 03 0 0 0 0 218 Aug 05 0 0 0 0 220 Aug 07 0 0 0 0 222 Aug 09 0 0 0 0 224 Aug 11 0 0 0 0 226 Aug 13 0 0 0 0 228 Aug 15 0 0 0 0 230 Aug 17 0 0 0 0 232 Aug 19 0 0 0 0 234 Aug 21 0 0 0 0 236 Aug 23 0 0 0 0 238 Aug 25 0 0 0 0 240 Aug 27 0 0 0 0 242 Aug 29 0 0 0 0 244 Aug 31 0 0 0 0 246 Sep 02 0 0 0 0 248 Sep 04 0 0 0 0 250 Sep 06 0 0 0 0 252 Sep 08 0 0 0 0 254 Sep 10 0 0 0 0 256 Sep 12 0 0 0 0 258 Sep 14 0 0 0 0 260 Sep 16 0 0 0 0 262 Sep 18 0 0 0 0 264 Sep 20 1 0 0 0 266 Sep 22 3 0 0 0 268 Sep 24 4 0 0 0 270 Sep 26 6 0 0 0 272 Sep 28 12 2 1 0 274 Sep 30 17 2 1 0 276 Oct 02 22 2 1 0 278 Oct 04 25 3 2 0 280 Oct 06 29 6 3 0 282 Oct 08 35 10 5 0 284 Oct 10 43 12 6 0 286 Oct 12 50 16 8 2 288 Oct 14 54 18 9 2 290 Oct 16 61 23 12 2 292 Oct 18 66 30 17 3 294 Oct 20 70 34 20 6 296 Oct 22 77 42 24 9 298 Oct 24 80 51 29 10 300 Oct 26 85 59 38 16 302 Oct 28 87 63 43 20 304 Oct 30 91 66 52 27 306 Nov 01 92 69 58 34 308 Nov 03 94 77 65 39 310 Nov 05 96 83 71 45 312 Nov 07 97 89 78 51 314 Nov 09 98 91 81 58 316 Nov 11 100 93 89 66 318 Nov 13 100 95 91 73 320 Nov 15 100 97 93 79 322 Nov 17 100 97 94 81 324 Nov 19 100 98 96 85 326 Nov 21 100 99 97 89 328 Nov 23 100 99 99 92 330 Nov 25 100 100 99 95 332 Nov 27 100 100 99 97 334 Nov 29 100 100 100 97 336 Dec 01 100 100 100 99 338 Dec 03 100 100 100 99