IEM "Climodat" Reports
These "Climodat" reports provide some answers to the most common climatological questions we get routinely asked. Here are some important notes about the products presented on this page.
- These reports are based on the daily climate observations from the NWS COOP network. Some quality control is done and estimating is done to create a complete time series without missing data. You can download the daily data.
- There is a station monitor app that allows you to see current summarized statistics for a station collection of your choice.
- The Automated Data Plotting application on this website contains charts and downloadable datasets that may interest you.
Data is available from the following states:
Download This Report Download This Report as Excel View This Report in Autoplot App
# IEM Climodat https://mesonet.agron.iastate.edu/climodat/ # Report Generated: 09 Jul 2025 # Climate Record: 1893-01-01 -> 2025-07-09 # Site Information: [IA0200] AMES-8-WSW # 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 1 0 0 0 260 Sep 16 3 0 0 0 262 Sep 18 6 0 0 0 264 Sep 20 9 1 1 0 266 Sep 22 12 1 1 0 268 Sep 24 14 3 1 0 270 Sep 26 19 3 3 0 272 Sep 28 27 7 3 1 274 Sep 30 35 9 4 1 276 Oct 02 41 12 5 1 278 Oct 04 48 14 6 2 280 Oct 06 58 18 9 3 282 Oct 08 62 26 15 4 284 Oct 10 68 32 21 6 286 Oct 12 73 40 27 10 288 Oct 14 76 43 29 10 290 Oct 16 81 47 34 12 292 Oct 18 84 52 39 17 294 Oct 20 86 58 44 20 296 Oct 22 90 68 50 23 298 Oct 24 91 73 56 24 300 Oct 26 93 79 61 34 302 Oct 28 96 83 68 38 304 Oct 30 96 88 71 45 306 Nov 01 98 88 77 55 308 Nov 03 98 93 84 61 310 Nov 05 100 93 89 65 312 Nov 07 100 96 91 70 314 Nov 09 100 96 93 76 316 Nov 11 100 97 94 81 318 Nov 13 100 98 95 85 320 Nov 15 100 98 97 89 322 Nov 17 100 98 97 91 324 Nov 19 100 99 99 94 326 Nov 21 100 99 99 96 328 Nov 23 100 100 100 96 330 Nov 25 100 100 100 99 332 Nov 27 100 100 100 99 334 Nov 29 100 100 100 99
Publications Citing IEM Data (View All)
These are the most recent 10 publications that have cited the usage of data from this page. This list is not exhaustive, so please let us know if you have a publication that should be added.
- Tinoco, A., 2025, Microbial-derived residues and their role in carbon stabilization and aggregate formation in southern Wisconsin cropping systems. UW Madison PhD Thesis. https://proquest.com/docview/3202717023
- Patrikar, J. Rethinking the Safety Case for Risk-Aware Social Embodied Intelligence. Carnegie Mellon University PhD Thesis https://www.proquest.com/docview/3207089540
- Potter, L., 2025, Increasing annual r easing annual rainfall as r ainfall as recorded at fiv ded at five weather stations in e weather stations in the Cedar River watershed and adjacent, Eastern Iowa. The Compass: Earth Science Journal of Sigma Gamma Epsilon: Vol. 94: Iss. 2, Article 2 https://doi.org/10.62879/c13461383
- Cheng, Y., T. Stewart, et al. 2025, Exploring the role of accentuated cut edges (ACE) and macerating enzymes in modifying polysaccharide composition and pomace microstructure in Marquette red wine. Food Chemistry https://doi.org/10.1016/j.foodchem.2025.144083
- Wang, X., Y. Xu, et al. 2025, Knowledge-guided machine learning model with soil moisture for corn yield prediction under drought conditions. arXiv:2503.16328v1 [cs.LG] https://arxiv.org/pdf/2503.16328
- Patrikar, J., J. Dantas, et al. 2025, Image, speech, and ADS-B trajectory datasets for terminal airspace operations. Scientific Data. 12, 468. https://doi.org/10.1038/s41597-025-04775-6
- Moore, E., M. De, et al. 2025, Connections between roots and soil health across agriculture management practices. Plant Soil (2025). https://doi.org/10.1007/s11104-025-07367-w
- Islam, S., J. Mount, et al. 2025, Assessment of Drought Impacts on Crop Yields (Corn and Soybeans) Across Iowa During 2000 – 2022. https://doi.org/10.22541/au.173890810.01900586/v1
- Rogovska, N., J. Kovar, et al. 2024, Impact of tillage, cover crop, and in situ bioreactors on nutrient loss from an artificially drained Midwestern Mollisol. Journal of Environmental Quality. https://doi.org/10.1002/jeq2.20668
- Ayanlade, T., S. Jones, et al. 2024, Multi-modal AI for Ultra-Precision Agriculture. https://doi.org/10.1007/978-981-97-7762-4_13