Here in juniper canyon it got down to 23 and woke up to 1.5” of snow. Seems better for snow and thunderstorms already than in Redmond where I was. Had four great thunderstorms earlier this week which is more than I had all last year in Redmond.
You guys have inspired me, so I checked the temperature stats for Chicago for the meteorological summers leading into strong Nino events. Of course this is assuming that this upcoming Nino event will peak at a strong intensity, which looks very likely but not guaranteed yet.
All temperature anomalies are relative to the 1991-2020 normals.
1957 JJA: +0.4
1965 JJA: -2.6
1972 JJA: -2.0
1982 JJA: -5.0
1987 JJA: +0.4
1991 JJA: +0.4
1997 JJA: -2.9
2015 JJA: -2.8
2023 JJA: +0.3
So, we see that 5 summers were cooler than average and 4 were technically a little warmer than average, but essentially average for all intents and purposes -- and interestingly clustered around +0.3 to +0.4. Although it's a small sample size of 9 years, there are no torch summers.
Based on this and the various seasonal models, my guess would be for an average-ish summer around Chicago. Can't rule out a cooler than average one, but I'd be leery about going too far in that direction given increased UHI around ORD (even compared to 10-20 years ago) and also with some of the tendencies that we have seen with warmth in the CONUS so far this year. A blistering hot summer looks pretty unlikely, but weather has a way of humbling so I wouldn't say it can't happen.