Weather in Grinnell, IA
Grinnell, Sunday, 18 October, 23:35
Clear. Feels like 45°. High 66°, low 40°.
Monthly outlook for Grinnell, IA: average high 61.9°, average low 45.4°. That is 2.4° above the climate normal for October. Precipitation is expected on 6 days (about 1.7 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 22 October (69.8°), the coolest 1 November (37.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 64.4° | 58.9° | +3° |
| 28 October – 6 November | 57.7° | 54° | +2° |
| 7 November – 16 November | at normal | 48.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Malcom (9 mi).
0
Grinnell, Monday, 19 October
Overcast. High 66°, low 41°.
0
Grinnell, Tuesday, 20 October
Clear. High 67°, low 41°.
0Grinnell, Wednesday, 21 October
Overcast. High 69°, low 49°.
0Grinnell, Thursday, 22 October
Clear. High 70°, low 51°.
0Grinnell, Friday, 23 October
Clear. High 67°, low 52°.
0.02
Grinnell, Saturday, 24 October
Light rain. High 68°, low 52°.
0.02Grinnell, Sunday, 25 October
Light rain. High 61°, low 44°.
0.57Grinnell, Monday, 26 October
Rain. High 58°, low 45°.
0.2Grinnell, Tuesday, 27 October
Light rain. High 51°, low 43°.
0.09Grinnell, Wednesday, 28 October
Light rain. High 52°, low 47°.
0.01Grinnell, Thursday, 29 October
Light rain. High 61°, low 53°.
0.12Grinnell, Friday, 30 October
Light rain. High 64°, low 51°.
0.04Grinnell, Saturday, 31 October
Light rain. High 57°, low 42°.
0.61Grinnell, Sunday, 1 November
Rain. High 55°, low 38°.
0Grinnell, Monday, 2 November
Clear. High 58°, low 39°.
0.07
Grinnell, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.12Grinnell, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.07Grinnell, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06
Grinnell, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Grinnell, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Grinnell, Sunday, 8 November
Climate normal for this date — 60-year average.
0.09
Grinnell, Monday, 9 November
Climate normal for this date — 60-year average.
0.09Grinnell, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.09Grinnell, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.07Grinnell, Thursday, 12 November
Climate normal for this date — 60-year average.
0.07Grinnell, Friday, 13 November
Climate normal for this date — 60-year average.
0.03Grinnell, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Grinnell, Sunday, 15 November
Climate normal for this date — 60-year average.
0.04Grinnell, Monday, 16 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Grinnell, IA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Grinnell, IA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
41°Weather in Annapolis, MD47°Weather in Atlanta, GA51°Weather in Augusta, ME37°Weather in Austin, TX59°Weather in Baton Rouge, LA58°Weather in Bismarck, ND47°Weather in Boise, ID55°Weather in Boston, MA41°Weather in Carson City, NV58°Weather in Charleston, WV43°Weather in Charlotte Amalie, VI81°Weather in Cheyenne, WY
48°Weather in Columbia, SC49°Weather in Columbus, OH45°Weather in Concord, NH36°Weather in Denver, CO57°Weather in Des Moines, IA53°Weather in Dover, DE46°Weather in Frankfort, KY44°Weather in Harrisburg, PA40°Weather in Hartford, CT40°Weather in Helena, MT43°Weather in Honolulu, HI79°Weather in Indianapolis, IN46°Weather in Jackson, MS60°Weather in Jefferson City, MO46°Weather in Juneau, AK36°Weather in Lansing, MI48°Weather in Lincoln, NE52°Weather in Little Rock, AR53°Weather in Madison, WI52°Weather in Montgomery, AL48°Weather in Montpelier, VT36°Weather in Nashville, TN51°Weather in Oklahoma City, OK55°Weather in Olympia, WA48°Weather in Phoenix, AZ73°Weather in Pierre, SD54°Weather in Providence, RI40°Weather in Raleigh, NC47°Weather in Richmond, VA41°Weather in Sacramento, CA64°Weather in Salem, OR52°Weather in Salt Lake City, UT55°Weather in San Juan, PR78°Weather in Santa Fe, NM54°Weather in Springfield, IL49°Weather in St. Paul, MN55°Weather in Tallahassee, FL61°Weather in Topeka, KS52°Weather in Trenton, NJ41°Weather in Washington, DC45°43°Weather in Rossie, IA44°Weather in Royal, IA44°Weather in Rockford, IA52°Weather in Rudd, IA51°Weather in Randalia, IA49°Weather in St. Lucas, IA51°Weather in Luana, IA50°Weather in Strawberry Point, IA50°Weather in Osterdock, IA49°Weather in St. Olaf, IA53°Weather in Struble, IA49°Weather in Oyens, IA49°Weather in Remsen, IA50°Weather in Linn Grove, IA48°Weather in Marathon, IA44°Weather in Rembrandt, IA45°Weather in Quimby, IA43°Weather in Palmer, IA44°Weather in Plover, IA44°