The weather right now is warm (upper 60s), but occasionally windy so a walk in the open space/foothills/The Bosque may be pretty dusty. (The local joke is we have 2 seasons here: spring windy season and fall windy season.)
Pollen counts are also very high right now–which, if either of you are allergic to juniper/elm/trees, that may be a reason to avoid open space areas.
Monday will be cooler (low 60s) & partly overcast (bummer!) and Tuesday is supposed to be rainy. So it depends on what the weather is doing.
The Sandias are still pretty brown right now if you approach them from the city (western) side. Spring temperatures are here, but it’s still too dry for things to green up. If you want green–try one of the many walking trails along the Bosque (green space with old growth cottonwood trees along the Rio Grande) https://www.cabq.gov/parksandrecreation/open-space/lands/paseo-del-bosque-trail
Or you might want to drive up to the top The Sandia Crest via Sandia Crest Rd/NM 536. The wind-y, switch-backy road will take you to the top of the 11,000 ft Sandia Crest Peak from the east side of the mountains. Spectacular views! Plus there is a hiking trail along the ridge line above the city. Be prepared for it to be MUCH colder at the top of the mountains. 30 degrees or more. Be sure to bring plenty of water. Altitude + dry air + exertion = dehydration before you’ll even notice.
One more option is to ride the Sandia Peak Tram to the top of the Sandias. $25RT/person. Not for those with a fear of heights. One of longest trams in the world. http://www.sandiapeak.com You can walk along the Crest Trail from the upper tram house, but will need to return to the tram to get off the mountain.
Old town might be good alternative if the weather is not cooperative or it’s really windy. I’d suggest visiting the ABQ Museum of Art & History in Old Town, but the museum isn’t open on Mondays.
WARNING: whatever you plan, do NOT try to get from the east side of the Rio Grande to the west side or vice versa during rush hour. Major gridlock on all 4 bridges. Bump-to-bumper crawl.
Nob Hill is the college hang out area. Try the Flying Star Cafe. Or you could go The Frontier. Both will do, but the coffee and food is better at Flying Star.
Monroe’s is not my favorite for breakfast. I prefer The Range Cafe. There are several locations. The one closest to Nob Hill is on Menaul at Princeton.( http://www.rangecafe.com) Chile isn’t blazing hot so it’s where I always take out of towners. The Huevos Rancheros are killer. Best in Town. D1 and SIL always demand to have their first meal in town at The Range just so they can get the Huevos.