This is an original weather summary based on aggregated forecasts from National Weather Service and other meteorological sources. Conditions are typical for late spring in northeast Iowa, with cool temperatures early in the period transitioning to warmer conditions later, along with periods of cloudiness and scattered precipitation chances. 

Day-by-Day Outlook

Wednesday, May 20 (Today)

High: 64–66°F | Low: 44–46°F

Sunny to partly cloudy with increasing clouds possible in the afternoon. North to northeast winds 5–10 mph. Low precipitation chance (near 0–5%). Comfortable daytime conditions with a cool evening. 

Thursday, May 21

High: 63–65°F | Low: 45–48°F

Partly to mostly cloudy. Light winds, becoming east/northeast around 5–10 mph. Minimal precipitation risk early, though some models suggest a slight chance of sprinkles later. Continued cool feel for mid-May. 

Friday, May 22

High: 61–65°F | Low: 49–52°F

Mostly cloudy with a chance of showers, especially in the afternoon (higher chances ~40–60% in some outlooks). Breezier conditions possible. Cooler highs with increased moisture. 

Saturday, May 23

High: 69–73°F | Low: 52–54°F

Partly sunny with a chance of showers or isolated thunderstorms, particularly later in the day. Warming trend begins. South winds may increase. 

Sunday, May 24

High: ~75–79°F | Low: ~53–56°F

Mostly cloudy to partly sunny. Chance of showers or thunderstorms lingers. Warmer and more humid conditions. 

Monday, May 25

High: Mid-70s to low 80s°F | Low: Mid-50s°F

Warmer with a mix of sun and clouds. Scattered shower or thunderstorm risk possible, especially if a frontal boundary moves through. 

Tuesday, May 26

High: Mid-70s to near 80°F | Low: Mid-50s°F

Variable cloudiness with potential for continued unsettled weather. Monitor for diurnal thunderstorm development in a warming, humid airmass. 

Overall Trends: Early week features below-average temperatures (mid-60s highs) under cooler air influence with north/northeast flow. A gradual warm-up occurs over the weekend into early next week as southerly flow returns. Precipitation chances are highest Friday through the weekend, with totals potentially light to moderate depending on shower coverage. 

Hazardous Weather Outlook

As of May 20, 2026, no active watches, warnings, or advisories are in effect specifically for Dubuque County, Iowa. 

Key Considerations for the Next 7 Days:

•  Severe Thunderstorm Potential: Marginal to slight risks may exist Friday through early next week, particularly Saturday–Tuesday, as warmer, humid air returns. Threats could include damaging winds, small hail, and heavy downpours in stronger cells. Monitor updates from the Storm Prediction Center, especially for afternoon/evening storms. 

•  Flooding: Any heavier rainfall on Friday–Saturday could lead to localized minor flooding in poor drainage areas, though widespread flooding is not currently anticipated.

•  Wind: Brief gusty winds possible with any thunderstorms or during frontal passages. No major wind events expected.

•  Temperature Extremes: Cool nights (upper 40s) early in the period could stress sensitive plants or outdoor livestock. No heat concerns yet.

•  Other: Typical spring hazards like lightning with thunderstorms and slippery roads if showers occur. UV indices will be moderate (3–7) on sunnier days—use sun protection during peak hours.

For the most up-to-date information, check the National Weather Service Quad Cities office or local radar, as forecasts can shift with new model runs. Stay prepared with a weather radio or app for alerts. Enjoy the spring transition in Dubuque!